FAQ 1. Q: Is it normal for True Wireless Earphones ( below referred to as TWS ) to get hot when charging? A: As the headphones use a more efficient charging method, so the temperature of the headphones will rise during the rapid charging process, this is normal, we have done the corresponding design protection for the core components, please rest assured that the use of. Note: The charging heat has been tested by laboratories and professional institutions are in line with safety regulations, please rest assured that the use of human body will not cause harm, at the same time we recommend that in the charging process as far as possible away from white phosphorus and other low flash point flammable and explosive hazardous materials. It is normal for the charging to feel slightly hot, and the charging environment should be avoided in a high temperature environment. If you find that the charging process is obviously hot to the extent that it burns your hands, smoke, etc., you should quickly cut off the charging power and stop charging. 2. Q: Does the battery of the TWS support replacement? A: The battery is not supported to be replaced. 3. Q: Is the charging case of TWS universal with other headphones? A: No. 4. Q: Is it possible to use mobile power to charge the headset? A: It is not recommended to use mobile power to charge the headset, most of the current mobile power comes with current protection function, when the mobile phone power detects that the output current is too low, it will disconnect the charging. As the battery capacity of TWS headphones is small, the current when charging is also small, generally lower than the current protection trigger value of the rechargeable battery, so it will trigger the current protection function of the mobile power and may not be charged enough. If the mobile power supports low current mode, you can use low current mode to charge the charging case. 5. Q: Will the TWS fall off easily when worn? A: No. TWS headphones are designed to be ergonomic, with ear caps that fit snugly in the outer ear canal and fit securely in the ear. Wearing effect will vary from person to person, you can choose the right size of ear cap according to your personal needs. 6. Q: Does the TWS headset support connection to the Xiaomi Band or other Bluetooth Bands? A: No, because TWS headset and Bluetooth Band are both receiving terminal equipment, so they cannot be connected. 7. Q: Does the phone support displaying the power level of TWS headset? A: For Xiaomi/Redmi series TWS, the ways to check are organized as follows. Way 1: You can check the power level of the headphones and charging case through the Xiaomi Earbuds App when the headphones are connected to your phone (currently only Redmi Buds 4 and Redmi Buds 4 pro support bundled with the Xiaomi Earbuds App). Way 2: Display dual headset and battery pack levels via MIUI pop-up window (supported by some phones, such as POCO F4 GT, Xiaomi 12 Pro, Xiaomi 12, Redmi Note 11 Pro, Redmi Note 11S, Redmi Note 11, Redmi Note 11 Pro 5G). Way 3: Apple phones and most Android phones support displaying headset power, you can check the headset power roughly in the status bar at the top of the phone, which shows the headset with the lowest power level. 8. Q: Are the TWS headsets stable in terms of connectivity when talking, listening or gaming? A: TWS headsets are rigorously tested prior to launch to ensure connectivity stability for mainstream devices; and higher versions of the Bluetooth protocol are compatible with lower versions of Bluetooth devices. However, due to the nature of the Bluetooth signal connection, in areas with dense electromagnetic signal interference at 2.4GHz (such as when there are multiple routers or Bluetooth devices around the Bluetooth headset at the same time), there will be varying degrees of interference and intermittent (intermittent disconnection), lagging or no sound may occur. In addition, some Bluetooth audio output terminals may differ in their level of driver/debug, leading to compatibility issues. 9. Q: Why is there a delay in the TWS headset for voice, video and gaming? A: With TWS headphones, because of the true wireless Bluetooth technology, audio is transmitted from the phone to the primary/secondary headset at the same time, there is some delay in the audio transmission, but it does not affect the music or calls. Whether it's the detail of the sound during a call or the rich emotion in music or movies, it is realistically rendered. 10. Q: Why is there a power gap between the left and right earphones of TWS headphones, and the duration of the left and right earphones is different? A: TWS headphones are divided into master and slave roles in use, the power consumption of the master and slave ear is different in different working states, the power consumption of the master ear is greater than that of the slave ear, which will cause a difference in the display of power (the power of the left and right ear is not the same as seen in the APP) for a long time, and it is normal that the battery life is not the same. There are also several scenarios that need attention. ① If you are used to wearing one headset while the other is charging in the case, then when both headphones are used, it is easy for the power levels in the left and right ear to be out of sync. It is recommended to keep the same wearing style for the left and right headphones to confirm the difference in power level between the left and right ear. ② When only one headset is worn, the headset can be used in transparency mode, but when it is not worn, only noise cancellation can be used to turn it off, this scenario may cause the power level of the left and right headset to be unbalanced. 11. Q: Do TWS headsets support third party software for voice calls and voice input? A: Usage varies by system. 1. Apple iOS and Android systems both support voice calls and voice input. 2. 2. Windows devices that support Bluetooth can make voice calls if they are connected and set up correctly; for voice input, third party software is required. 12. Q: Will there be any adverse reactions to wearing TWS headphones? A: TWS headphones have an in-ear design, so there will be a sense of pressure when the space inside the ear is closed, and you may feel slightly fatigued after wearing them for a long time. In addition, the volume of the headphones should not be too loud, as prolonged use of excessive volume will fatigue the auditory and ear canal nerves and cause pain and soreness in the ears. It is advisable to turn down the volume and take off the headphones after every 2 hours to give your ears a relaxing or pressure massage. 13. Q: Why some environments (railway stations, underground stations, substations, etc.) using TWS headset sound will stutter? A: The strong interference environment has an impact on the headset RF performance, causing the headset to listen to music stuttering, Bluetooth products have this problem, is a normal situation. In the office, coffee shop, home and other environments where interference is not strong, there will be no stuttering problem. 14. Q: Can I upgrade the headset again after the firmware upgrade failed? A: When the headset has a new version of firmware, open the Xiaomi Earbuds App will pop-up window to prompt to upgrade the headset version, the upgrade needs to meet two conditions: ① the headset and charging case power needs to be greater than 20%; ② both ears must be placed in the charging case and in the open box, out of the box will lead to upgrade failure, the upgrade process does not support calls, listening to music. 1. if the upgrade fails, the phone and headset Bluetooth connection, the headset can be used normally. 2. If the upgrade fails, you will be prompted to upgrade when you open the Xiaomi Earbuds App again, so you can click the upgrade button to upgrade again; if you cancel the upgrade, you will receive this reminder again when you enter the App next time. You can also do the upgrade manually on the device details page. 3. After the upgrade fails, you can put the left and right headphones in the box and long press the charging box button for 10s to reset, then try to upgrade again, after the upgrade is completed, you need to do nothing to wait for the headphones to connect back automatically. Note: The firmware version number may vary from batch to batch, it is recommended to connect to the Xiaomi Earbuds App to upgrade the firmware to the latest version. 15. Q: Why do some Android and Apple phones have different sound quality? A: This is because there are different encoding formats supported by the headset and different formats supported by the phone, and different encoding formats have different sound quality perceptions. (Take Redmi Buds 4 for example, the supported encoding formats are SBC, AAC) ① When the headset is connected to an iOS phone, only AAC, SBC audio encoding formats are supported. ② When the headset is connected to an Android phone, the audio encoding format is controlled by default on the phone. 16. Q: Why do TWS headphones sometimes automatically adjust the volume level when connected to a mobile phone? A: The following situations are possible auto-adjustment of volume level, they are normal, please feel free to use. ① When the headset is connected to a MIUI device for the first time, the MIUI volume protection mechanism causes the volume to adjust automatically. ② iOS will automatically synchronise the volume level when the headset is connected to an iOS device for the first time. ③ After adjusting the volume of the connected device, the volume will be synchronized with the last set volume when connecting again. 17. Q: Why does the music continue to play automatically when I take the TWS headphones off during music playback? A: In this case, you need to check whether the headphones support the "Wear Detection (In-Ear Detection)" function. 1. In-ear detection function location: open Xiaomi Earbuds App - Bluetooth devices - you can see the headphones currently connected to use, click on it and you can see the "Wear detection" option. 2. 2. Note: When the headphones support wear detection function, please do not play with the headphones in your hands after taking them off to pause the music, do not cover the wear detection area with your hands, and do not place them too close to metal and other conductor materials on the table to avoid triggering the music to play automatically. 18. Q: What should I do if there is no MIUI pop-up for the TWS headset connected to the phone? A:For Xiaomi/Redmi series TWS, please refer to the following steps to deal with it. 1. Check whether the phone model is supported and whether the phone system version is the latest. 2. Check if Xiaomi Quick Connect is on, how to turn it on: Settings->Bluetooth->Advanced Settings->Turn on the "Xiaomi Quick Connect" switch, when this switch is off, you cannot use MIUI pop-up function. 3. Headset case and mobile phone close to within 30cm, slowly open and close the lid 3-5 times (do not quickly open and close the lid), the initial pop-up window may be the default map, WiFi network after a while the animation effect will appear (the length of time and network speed related). Note 1: Mobile phones are recommended to be connected to WiFi (not mobile hotspot), because the quick connect function identifies the headset product after the first use needs to download the headset data via WiFi. Not using a hotspot is to avoid more mobile data traffic consumption; the first time through the WiFi download fast link resources to complete the same headset can be used without WiFi can also be normal pop-up window. Note 2: If a pop-up error occurs, follow these steps. ① Turn off the Bluetooth on the phone and then turn it back on. ② Reopen Xiaomi Quick Connect: go to Phone -> Advanced Settings -> close Xiaomi Quick Connect and then reopen it. ③ Go to Settings->Application Settings->Application Management->Three dots in the upper left corner->Show all applications->Search for "MIUI Bluetooth" and "Settings", clear all data of these two items, then turn on Bluetooth and repeat step 3. 19. Q: What happens when the TWS headset will be disconnected or delayed? A: Affected by the use of the environment, network, mobile phone codec speed, may cause different degrees of delay in the transmission of mobile phone audio data to the headset; headset using true wireless Bluetooth technology, there will be a certain delay in the process of audio transmission from the mobile phone to the main/sub-headset, but will not affect the quality of music and calls, whether it is the details of the sound during the call, or the rich frequency band in the music, it can be truly rendered. If there are multiple routers or Bluetooth devices around the Bluetooth headset at the same time, there will be varying degrees of interference and lag, interruptions and disconnection may occur. Note: The effective unobstructed connection distance for mobile phones is 10 metres, beyond which disconnection will occur. 20. Q: The TWS headset is already connected to my phone, how do I pair it with a new phone? A: You can refer to the following 2 methods. ① Put the headset into the charging case, with the cover open, press and hold the charging case button for 2 seconds and then enter the pending connection state. ② Put the headset into the charging case, open the lid, press and hold the charging case button for 10 seconds to clear the connection pairing list and enter the pending connection status. 21. Q: What is the effective distance for the TWS headset to be used? A: Currently the effective connection distance between Xiaomi/Redmi TWS and your phone is around 10m in an unobstructed environment. If you are in the office or at home, the effective distance will be reduced due to walls or other obstacles in the way. So there will be situations where the phone will lag or the Bluetooth connection will be disconnected when taking the headset to the bedroom in the living room. 22. Q: Is the larger the Dynamic of the headphones the better? A: The Dynamic unit of headphones is not the larger the diameter, the better the sound quality. dynamic size is the sound generating unit of the headphones, generally speaking, the dynamic size has improved the headphone resolution, but the sound quality is not guaranteed. The key to the sound quality of headphones is the overall tuning. A headphone's "good sound" is dependent on many factors and needs to be optimised in many ways to achieve the best sound quality. 23. Q: Can the charging cable that comes standard with the TWS headphones transfer data? A: The charging cable that comes standard with Xiaomi/Redmi TWS is only guaranteed to fulfill the function of charging the headphones, not for transferring data. Note 1: Due to design differences, some charging cables do not support data transfer, such as Redmi Buds 4 Pro, Redmi Buds 4. Note 2: Even if the charging cable can be used to read data on individual models, the stability of the data transfer function is not guaranteed (stability may be affected depending on the device). 24. Q: Why does the headset make a harsh sound when I hold it in my hand? A:When the headset is turned on Transparency mode, the headset microphone will amplify the ambient noise, when the headset is held in a small environment, the headset will play the noise amplified by the microphone again by the headset speaker, and then amplified by the microphone again, forming a positive cycle, thus causing the headset to whistle. Similar to KTV where the microphone is placed close to the speakers to produce a whistling sound. There is no problem with the headset itself, and this will not occur when worn normally, even if the hand-held whistling will not damage the headset, so please feel free to use it. 25. Q: Why is there a pop-up message "This is not your headset"? A: If the headset has been connected to another device and is found by a phone that supports pop-ups, it will say "This is not your headset", which is normal. In this case there are 2 ways to connect the headset. 1. Place the headset in the case and open the lid, then press and hold the headset case button for 2 seconds to connect to the device with your phone. 2. Reset the headset (put the headset into the charging case, open the lid and press and release the headset case button for 10 seconds or more, when you see the light blinking, it means the reset is successful and the pairing is entered). 26. Q: Why is the wind sound more obvious when wearing headphones in windy conditions? A: The Feed-forward mic of the headset collects external sound and when the wind is strong, it will blow directly into the microphone device causing noise, the current logic used by the software is to reduce the noise cancellation depth in windy situations to provide a good experience. Q: Why does the noise cancellation/ transparency effect become weaker in some scenes? Or does it switch back and forth? A: When it is windy, the headset will automatically reduce the effect of wind noise in order to avoid the noise caused by wind noise. At the same time, the noise cancellation and transparency effects are also weakened.
Troubleshooting 1. Q: What should I do if the charging case of the TWS headset cannot be charged? A:When you cannot charge the headphone case, please follow the following methods to troubleshoot. ① Try to replace the charging cable and charger to see if it can be charged, if it can be charged after replacement it may be a faulty charging cable or charger. ② Use the standard charging cable and charger to charge other devices to verify whether the charging cable and charger are normal, if it charges other devices normally, please charge the charging case for half an hour and then observe, if it still cannot be charged please apply for after-sales testing. Note: To ensure a good product experience, please charge the charging case in time after the power is below 10% to ensure the life of the headset. 2. Q: What should I do if the charging case of the TWS headset cannot charge the headset? A:Please follow the following methods to troubleshoot. ① Check if the charging case is charged, if the charging case is not charged, charge the charging case and then charge the headset, try to turn on the headset again after charging; if the headset has not been used for a long time resulting in low battery, the indicator light may not light up when charging at first, it is recommended to observe the indicator light after half an hour of charging. ② Check whether the isolation film on the charging contacts of the headset has been removed, check whether the charging pins inside the charging contacts/charging case of the headset are dirty, Remove the film and clean up the dirt in time to ensure the charging contacts and the charging pin are in good contact. ③ Try to reset the headset, reset method: put the headset into the charging case, long press the function button for about 10 seconds or more, wait for the indicator light to light up, release the button. ④ If the above operation is not effective, apply for after-sales service. 3. Q: What should I do if the indicator light of the TWS headset does not light up? A: First of all, you have to confirm whether it is the indicator light of the charging case or the indicator light of the headset body (some TWS headset bodies have a separate indicator light). 1. If the indicator light of the charging case does not light up, it may be a loss of power due to the depletion of power, we suggest charging for half an hour and then observe the indicator light. 2. If the headset body indicator does not light up, make sure the charging contacts are in good contact and refer to the following ideas. ① It may be that the headset is out of power, suggest putting it into the headset case to charge for half an hour and then observe the headset indicator. ② Check if the power of the headset case is sufficient, if not, please put the headset into the charging case and then connect the adapter to charge, and observe again after half an hour. 3. Check the charging contacts of the headset and the USB-C connector of the charging case for any abnormalities such as dirt and defects. 4. If the above steps do not solve the problem, please apply for an after-sales test. 4. Q: What if I can't search the name of the headset using my mobile phone/laptop and other devices? A: Please make sure the headset is in pairing status, if the indicator white light is not flashing, the Bluetooth headset cannot be searched. ① Check whether the charging case or the headset is low on power. If the battery level is normal, the charging case indicator light will be white for 5 seconds after opening the cover. ② Check whether the charging case or headset contacts are dirty, please wipe the contact contacts of the headset and charging case carefully to ensure good contact. ③If the battery is sufficient but still cannot be searched, please press and hold the function button of the charging case for 10s to reset the headset and then try to search for pairing again. ④ Try to search after restarting the phone, changing the phone or changing the usage environment, if you still cannot search, please apply for after-sales testing. 5. Q: What should I do if the device can search for the headset, but cannot connect? A: If the device can search for the Bluetooth name of the headset, but cannot connect, please refer to the following steps. ① It may be the Bluetooth data of the device is abnormal, try to delete the previous connection record on the device side, and then try to pair the connection again. Steps to delete the Bluetooth record on the mobile phone: phone -> Settings -> Bluetooth -> "Redmi Buds 4" -> Cancel pairing. ② Press and hold the headset charging case function button for 10s to reset the headset and try to connect again. 6. Q: What should I do if the PIN code or pairing password error always appears when I connect my device to TWS headset? A: You can try to enter "0000", if it is still wrong, it may be the Bluetooth data on the device side is abnormal, try to delete the previous connection record on the device side, long press the headset charging box for 10s to reset the device, and then try to pair the connection again. 7. Q: What should I do if my TWS headset cannot be reconnected after disconnecting from my device? A: If you encounter that the headset does not reconnect automatically after the charging case is opened, please refer to the following steps. ① Bluetooth may not be turned on for your phone, or Bluetooth is not working properly. Turn off Bluetooth from your phone's Bluetooth device interface and turn it on again, then click connect the headset and see if you can connect successfully. ② It may be that the phone is far away from the headset, exceeding the effective transmission distance (10m), or there is an obstacle blocking the headset from the phone. ③ The headset automatically reconnects to the last connected device by default, it may be that your headset was not connected to this phone for the last time. ④ Due to the nature of Bluetooth headsets, electromagnetic waves in your area may interfere with the Bluetooth connection and prevent the headset from automatically reconnecting. ⑤ If you still cannot connect using the above methods, you can put the headset into the charging case and press and hold the charging case button for 10s to make the headset enter the pairing state and the phone will search for the connection again. 8. Q: What should I do if my device is not searched using the Xiaomi Earbuds App? A: Please refer to the following steps. 1. Ensure that the binding steps are correct, as follows. If there is no connection for a long time, the headset may go to sleep. ① Put the headset into the charging case, with the cover open, press and hold the charging case button for 2 seconds and then enter the pending connection state, the white light will flash. ② Put the headset close to the phone and follow the connection guide, the indicator light will turn off when the connection is successful. 2. The version of the Xiaomi Earbuds App may be too low. Please scan the Xiaomi Earbuds App QR code on the box with your mobile phone or search for it in the app store. Please scan the QR code on the box or search for "Xiaomi Earbuds App" in the app shop to get the latest version of the app. 3. It is possible that the headset does not have an app, for example, Redmi Buds 4 does not support the Xiaomi Earbuds App for iOS. 4. There may be a lot of interference in the surrounding area, so please try another location. Due to the nature of Bluetooth headsets, electromagnetic waves in your area may interfere with the Bluetooth connection, and you may even experience no sound or disconnection after connecting. 9. Q: Why do I occasionally hear current sounds during headphone connection or music/call scenarios after turning on noise cancellation and transparency mode? A: All electro-acoustic devices have a certain signal-to-noise ratio (the ratio of signal to noise, the higher the ratio, the more resistant the device is to interference), and all electronic products with audio functions have a slight current and noise in use, which is easily perceived at low volumes and is normal. If you feel uncomfortable, we recommend that you turn off the noise cancellation mode in a quieter environment. Note: Scenes where there is a low probability of current or noise or lagging - places with dense traffic and more wireless devices, such as underground stations, airports, traffic light intersections, and routers - are prone to these phenomena. 10. Q: Why do the headphones suddenly appear silent during listening to music? How can I recover? A: The headphones need to keep the audio synchronized in both ears during use, when there is relatively more interference around, the headphones may not be synchronized with the audio link resulting in a silent situation. When there is no sound problem, you can try to put the headphones back into the charging box to close the box, wait for 60S and then open the box to connect back to the phone, after the Bluetooth reconnect, confirm whether the music can be restored in the headphones to play. 11. Q: Can I be allergic to wearing headphones? What should I do if I have an adverse reaction? A: Headphones, ear caps and other parts that come into contact with the skin have passed strict testing for harmful substances and will not affect the human body, but due to individual differences, there may be a few people who experience discomfort with specific materials. When using headphones, please avoid wearing them for long periods of time (e.g. when sleeping) and keep your ears clean to avoid discomfort, inflammation, suspected allergies, etc. caused by sweat or dirt residue. 1. Possible causes of suspected allergy symptoms include ① prolonged wear (e.g. when sleeping), lack of ventilation and sweat residue on the headphones. ② Dirt in the headphones, which has not been cleaned for a long time and the residue builds up leading to suspected allergy symptoms. 2. If you experience severe discomfort or inflammation and allergy in your ears after wearing them, it is recommended that you stop wearing them and consult a doctor promptly. If you experience only mild itching, it is recommended that you follow these guidelines. ① After wearing the headphones for sports, please check if there is any sweat on the headphones, and if so, please wipe them off before putting them in the case. ② For daily use, regularly check if there is any dirt on the headphones, ear caps and charging case, if there is, please clean them in time. ③ Take off the headphones after long continuous wear, let the ears rest for about half an hour to relieve ear fatigue. ④ After taking a shower, if there are residual water droplets inside the ears, please clean them up before wearing the headphones and using them again. 12. Q: TWS headset prompted to upgrade successfully, but still the previous version? A: Due to the usage environment, abnormal operation, etc., the headset may have only one headset upgraded to the new version after the firmware upgrade is completed, and then after a few minutes, both revert back to the old version. This is to ensure the normal use of the product, the headset will check if both headphones are in the new version after the upgrade is completed and rebooted, if abnormal then it will revert back to the old version;. When this happens, click the upgrade button again and retry the upgrade to upgrade to the new version normally. If you still have the problem after trying again, place the left and right headset into the charging case and press and hold the charging case button for 10s to reset, then click the upgrade button and retry the upgrade. 13. Q: What should I do if the sound is intermittent or noisy with TWS headphones? A: Please follow the following methods to troubleshoot. ① It may be because the phone or headset is low on power, please fully charge it and observe again. ② If the distance between the phone and the headset or between two headphones is too far or there is an object blocking the signal (e.g. a wall), the sound may be intermittent or noisy, bring the phone and the headset close together or both headphones close together, while avoiding the signal being blocked. ③ There may be signal interference in the environment you are using, try comparing the presence of this phenomenon in other environments of use. ④ Reset the headset, delete the connection record of the phone, restart the phone and then pair it again, if there is still a problem of intermittent sound or noise, replace it with another phone to test, if the problem still exists, after-sales testing. 14. Q: What should I do if the headset is silent when I use TWS headset to talk or listen to music? A:Please follow the following methods to investigate. ① Determine if the volume of your phone is too low, if the volume is normal, go to the "Bluetooth settings" of your phone, check the "phone audio" and "media audio" of this headset in the connected devices If it is on, please disconnect and reconnect. ② long press the headset charging box 10s reset the device, restart the phone and then connect to try to see if there is sound, if there is still no sound, then connect to other phones to test, if still can not be solved, please apply for after-sales testing. 15. Q: Why does the TWS headset not show the battery level in the notification bar when connected to the phone? A: Not all phones support this feature, if the phone does not support this feature then the battery level will not be displayed. 16. Q: Why does the TWS headset have sound for phone calls but not for music after connecting to the phone? A: Go to Bluetooth settings -> click the name of the connected headset -> turn on the "Media Audio" option, when this option is off, there will be no sound when listening to music and watching videos, in this case you need to turn on this option manually. 17. Q: What should I do if the sound of the left and right headphones of the TWS headset is not in sync? A:Please refer to the following steps to troubleshoot. 1. Reconnect the headset (put the headset back into the charging case, close the charging case and open it again to take it out) and test whether the sound of the left and right headset is synchronized. 2. Reset the headset, reconnect it after the reset and test whether the sound of the left and right headset is synchronized. 18. Q:What should I do if my phone is connected to the headset and I receive a call or message notification, but both the headset and the phone have beeps? A: This is the normal logic of Android system by default; MIUI 12 has added a sound assistant function to modify this configuration. ① If you have a Xiaomi phone with MIUI12 or above, you can turn off the "Allow speakerphone ringing" option in the Sound Assistant and only sound will come from the headset. ② If you are using another phone, we recommend you to contact your phone's customer service regarding the "availability or location of this feature". 19. Q: Why does the touch headset touch panel not respond? A:Please refer to the following information to troubleshoot. ① Please touch the middle of the headset touch panel (glossy) in accordance with the function description of the headset user manual. ② Touch the headphones 2 times to pause/play music in music, please open the music app on your mobile phone before operation. ③ The headphones are not worn correctly, the headphones do not fit closely to the ears, please adjust the position of the headphones or change the size of the earcups to ensure that the headphones fit closely to the ears. ④ The speed of continuous touch is too slow, please ensure that 2 or 3 touches are completed in quick succession. ⑤ Too much grease or liquid on your fingers may cause the touch area to be insensitive, make sure the surface of your fingers is clean before pressing. 20. Q:How to solve the problem of whistling noise when the headset is in noise cancellation mode? A:Please follow the method below for troubleshooting. ① Please observe whether the headset pressure relief hole is blocked by foreign objects (being blocked may lead to abnormal tuning function). ② Reset the headset and enter noise cancellation mode again to see if there is still whistling noise. ③ If the above steps do not solve the problem, please apply for after-sales testing.