Xiaomi Mi Band 4

Weight

22.1g

Water Resistance Rating

5 ATM

Display Type

AMOLED

Screen Size

0.95″

Resolution

120 x 240 RGB

Colour Depth

24bit

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)

Wristband width

18mm

Wrist strap material

Thermoplastic polyurethane

Adjustable wrist strap length

155-216mm

RAM

512KB

ROM

16MB

Sensors

3-axis accelerometer 3-axis gyroscope;
PPG heart rate sensor;
Capacitive proximity sensor

Wireless connectivity

BT5.0 BLE

Battery

LiPo, 135mAh

Charging Type

2Pin Pogo Pin

Charging time

≤ 2 hours

Standby time

Up to 20 days

Motor Type

Rotor

Body material

Polycarbonate

App

Mi Fit

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 calories burned

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, proximity sensor, 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, Bluetooth broadcasting, battery level display, different
ways to wear, OTA updates