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Exterior view
Dimensions

Wristband body17.9 x 46.9 x 12mm

Total length of wrist strap247mm

Adjustable length of wristband155 - 216mm

Specifications

Battery capacity110mAh

Standby timeapprox. 20 days[1]

Battery typeLi-Ion Polymer Battery

Input voltageDC 5.0V

Input current250mA Max

Weightapprox. 20g (including wristband)

Body materialplastic

IP rating5ATM[2]

Operating temperature-10℃~50℃

Screen size0.78 inches

Display resolution128 x 80

Sensors3-axis accelerometer and PPG heart rate sensor

Wireless connectivityBluetooth 4.2 BLE

Setting requirementsPhones with Bluetooth 4.0 and Android 4.4 or iOS 9.0 or higher

Models that support the unlock functionmodels running MIUI systems on Android 4.4 or higher or Android 5.0 or higher and which support the Smart Lock function

Wrist strap materialthermoplastic elastomer

Buckle materialaluminum alloy

Features

Displays the timedisplays incoming call/rejectsinstant messages (What' app, Facebook etc.)

Inactivity alertsprovides inactivity alertsevent reminders

Vibrating alarmdo not disturb modefollow friends and family

Automatic step counterphone unlockevent reminders

Sleep monitorphone locatorheart rate monitor

Weather forecastgoal settingthe notification of messages

Calorie counterspeed remindersmileage

Dial replacementnotification browsingtimer

Setting display itemslow battery remindersmultiple ways to wear

Can be worn while swimmingscreen lockOTA upgrade

Package contents
Wristband body x1 wrist strap x1 specialized charging cable x1 user manual x1
1. The data on battery life was taken from testing conducted by the Huami Technology Laboratory using the following parameters: using factory default settings, receiving and displaying 50 message per day, having one alarm vibrate for 5 seconds, touching the button to display the time 10 times, spending 2 minutes on other operations, checking your measured heart rate 3 times, exercising for 1 hour per week (and activating the running function to monitor heart rate in real time and turning off heart rate notifications), and opening the Mi Fit App one a day to synchronize testing for data usage methods. During actual use, factors such as settings, operations, and the usage environment will have an impact on the battery life. These factors may cause results obtained during actual use to differ from lab data.
2. Data sources: IP rating of 5 ATM (equivalent to a water depth of 50 meters) is based on testing conducted by the National Quality Supervision Clock Inspection Center in accordance with GB/T 30106-2013, Report No. QT1803032. It can be worn in the shower, in the pool, or while swimming near the shore. It is not suitable, however, for saunas or diving.

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