Explanation:
1. Maybe the device is connected to 2.4G WiFi at this time. Since bluetooth and WiFi share antenna work in the same frequency band, the bluetooth will be interfered when the amount of data transmitted by WiFi is large,guide to turn off WiFi and try again.
2. Put the two earphones into the charging box, press the function button of the charging box for more than 10S, and release the button when the indicator light flashes red and white alternately to complete the factory setting restoration;Try pairing again after factory Settings are restored;
3. Try to match with other equipment. If it fails, it is suggested to go to after-sales center for inspection.