Mi Smart Band 4

Specifications:

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

Features

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,
the 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

Package contents

• Mi Smart Band 4 X 1
• Wrist strap X 1

• Specialized charging cable X 1
• User guide X 1

Step up, live more

Full-color display and heart rate monitor

Your transformation begins now.

• Full-color 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.