Mi Smart Band 4 are amazing and simply lift on the wrist for Time, wristband alarm, Sleep monitoring, steps, calories burned, Idle alerts, and 24/7 heart rate monitoring keeps you safe and healthy.
Sport workout modes: Treadmill, exercise, outdoor running, cycling, walking, pool swimming; Count steps, and distance.
Full-color AMOLED touch display with a screen size of 0.95", resolution of 120 x 240 RGBand 2.5D tempered glass with anti-fingerprint coating.It has RAM 15KB and ROM of 16MB with Sensors of PPG heart rate sensor, 3-axis accelerometer + 3-axis gyroscope and Capacitive proximity sensor.
Connection type Bluetooth 5.0 and system requirement of Android 4.4, iOS 9.0 or above.
Send notification alerts to the band, so you don't miss any call, message. With a battery capacity of 135mAh with standby up to 20 days and Weight of 22.1g.
Removable wrist strap with a strap length of 155-216mm and width of 18mm. (Mi Smart Band 4 is compatible with Mi Band 3 straps)