Mi Smart Band 4
Step up, live more
Full colour display and heart rate monitor
Your transformation begins now.
Full colour AMOLED touch display
View call, text, and app notifications
Water resistant up to 50m*；3-axis accelerometer, 3-axis gyroscope
Up to 20 days battery*
A single charge lasts up to 20 days.
24/7 heart rate monitoring and sleep tracking.
A BEAUTIFUL TRANSFORMATION
Get a wider, more colourful view right on your wrist.
The all-new full colour AMOLED touch display that’s 39.9% larger* and brighter than ever before.
Instantly view call, text, app notifications and music in play.
Keep your hands free as you keep up with life.
A MOTIVATIONAL TRANSFORMATION
Your personal trainer is with you every step of the way.
Whether you're doing high-speed battle rope training or an aerobic battle rope workout, Mi Smart Band 4 will track your heart rate, calories burned and more.
Tracks your pace and step count
Maintain a safe workout, whether you're running short or long distance.
5 ATM water resistant up to 50m
Recognizes 5 different swim styles
Records 12 data sets including swimming pace and stroke count
5 core data sets
Helps you improve power walking efficiency
Check your heart rate in real time to make sure you get the best workout as you climb mountain roads or dash around the city.
A REINVIGORATED TRANSFORMATION
Improving your daily energy starts with understanding your sleep patterns.
Accurately tracks light and deep sleep as well as heart rate during sleep to help you adjust your sleep patterns.
Mi Fit app
Records your health data to help you get the most out of life.
A POWERFUL TRANSFORMATION
24/7 Heart rate monitoring
keeps you safe and healthy.
24/7 Heart rate
Safeguard your health at all times.
Alerts you when your heart rate is too high.
Stay active as you get reminders to get up and get moving.
AN ENDURING TRANSFORMATION
Stays by your side for 20 days on a single charge.
Product SKU XIA00009 Model 23742 Condition New Connection See Description Colour See Description Features
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
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
Warranty 1 Year Warranty