Water Resistance Rating:5ATM
Screen Size:0.95 inches
Resolution:120 x 240 RGB
Screen Brightness:Up to 400 nits (max brightness), brightness adjustable
Touchscreen type:On-cell capacitive touchscreen
Screen protection:2.5D tempered glass with anti-fingerprint coating
Button:Single touch button (wake up, go back)
Wrist strap type:Removable wrist strap
(Mi Smart Band 4 is compatible with Mi Band 3 straps)
Wrist strap material:Thermoplastic polyurethane
Adjustable wrist strap length155-216mm
Sensors:3-axis accelerometer + 3-axis gyroscope;
PPG heart rate sensor;
Capacitive wear monitoring sensor
Wireless connectivity:Bluetooth 5.0 BLE
Charging Type:2-Pin Pogo Pin
Charging time:≤ 2 hours
Standby time:≥ 20 days
System requirements:Android 4.4, iOS 9.0 or above
Sport Functions:6 workout modes: Treadmill, exercise, outdoor running,
cycling, walking, pool swimming; Count steps, distance, and
Health monitoring:Workout completion notifications, goal setting, sleep monitoring,
heart rate monitoring, all-day heart rate checking, resting
heart rate, heart rate chart, idle alerts
Other features:Alarm, pre-set watch face, customizable watch face, lock screen, timer, stopwatch, phone alarm and notifications, incoming calls, message notifications, calendar notifications, app notifications, weather forecast, Find my phone, phone unlock, event notification, Night mode, Do not disturb mode (works even without phone), music controls on band, battery level display, OTA updates
- Full colour AMOLED. touch display. View call, text, and. app notifications.
- Activity and. swim tracking. Water resistant up to 50m*； 3-axis accelerometer, 3-axis gyroscope.
- Up to 20 days. battery* A single charge lasts. up to 20 days.
- Health. monitoring. 24/7 heart rate. monitoring. and sleep tracking.