Mi Band 4 Fitness Tracker

IP rating5ATM

Screen typeAMOLED

Screen size0.95"

Display resolution120X240 RGB

Display color depth24bit

Display backlightMaximum brightness ≥400nit, adjustable brightness

Touch screenOn Cell mutual-capacitive

Screen protection2.5D tempered glass + AF coating

Button1-touch button (wake up, sleep)

PaymentSupport Alipay QR code payment

Wristband typeDetachable

Wrist strap width18mm

Wristband materialTPU

Wrist strap length155-216mm

Ram512KB

Rom16MB

Wireless connectivityBT5.0 BLE

Charging metho2Pin Pogo Pin

Charging time≤2 hours

VibrationRotor motor

Body materialPC plastic

APPMi Fit App

Setting requirementsAndroid4.4, iOS9.0 or higher

Weight Mi Band 4:
22.1g
Mi Band 4 NFC Version:
22.2g

Sensor Mi Band 4:
3-axis accelerometer + 3-axis gyroscope
PPG heart rate sensor
Capacitive wear sensor
Mi Band 4 NFC Version:
3-axis accelerometer + 3-axis gyroscope
PPG heart rate sensor
Digital MEMS microphone
Capacitive wear sensor

NFC Mi Band 4:
Not supported
Mi Band 4 NFC Version:
Support card scanning, Can be linked to bus cards,
access cards, Alipay

Voice interaction Mi Band 4:
Not supported
Mi Band 4 NFC Version:
Support band voice control, get answers,
control your smart home and mobile phone with just your voice

Battery Mi Band 4:
LiPo, 135mAh
Mi Band 4 NFC Version:
LiPo, 125mAh

Battery life Mi Band 4:
≥20 days
Mi Band 4 NFC Version:
≥15 days

Sports featurerunning, walking, cycling, indoor running, swimming, exercise, sports
secondary screen, speed reminder, heart rate reminder, step counting

Health monitoringCompliance reminder, goal setting, sleep monitoring, manual heart rate
resting heart rate, heart rate curve, sedentary reminder

Other featuresAlarm, preset dial, dial replacement, phone unlock,timer, vibrating alarm, incoming
call, instant messages, WhatsApp messages, calendars alerts, app notifications,
weather forecasts, phone locator, phone unlock, event reminder, night mode,
do not disturb modeAlipay offline payment, phone music playback, bluetooth
broadcast, charging progress display, setting display items, OTA upgrade