specs
Weight
22.1 g

Water resistance classification
5 ATM

Screen type
AMOLED

Screen size
0.95 "

Resolution
120 x 240 RGB

Color depth
24 bit

Brightness of the screen
Up to 400 nits (maximum brightness), adjustable brightness

Touch screen type
Capacitive touch screen in the cell

Screen protection
2.5D tempered glass with anti fingerprint coating

Button
Simple touch button (wake up, go back)

Wrist strap type
Removable strap (Mi Smart Band 4 is compatible with Mi Band 3 straps)

Width of the bracelet
18mm

Wrist strap material
Thermoplastic polyurethane

Adjustable wrist strap length
155-216 mm

MEMORY
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

Type of load
Pogo 2-Pin Pin

Loading time
= 2 hours

Wait time
Up to 20 days

Type of motor
Rotor

Body Material
Polycarbonate

Application
My fit

System Requirements
Android 4.4, iOS 9.0 or higher


characteristics

Sports Functions
6 training modes: treadmill, exercise, outdoor running, cycling, walking, swimming in the pool; count steps, distance and calories burned.

Health monitoring
Notifications of training completion, goal setting, sleep monitoring, heart rate monitoring, all-day heart rate review, resting heart rate, heart rate chart, and inactivity alerts.

Other features
"Alarm, proximity sensor, preset watch face, customizable watch face, lock screen, timer, stopwatch, alarm and phone notifications, incoming calls, message notifications, calendar notifications, app notifications, weather forecast, search my phone, unlock phone, event notification, night mode, do not disturb mode (works even without phone), music controls, Bluetooth streaming, battery level display, different ways to carry it and OTA updates.