Mi Smart Band 4

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.
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

A BEAUTIFUL TRANSFORMATION

Get a wider, more colourful
view right on your wrist.

The all-new full colour AMOLED touch display delivers more
brightness and is 39.9% larger.*

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.

Swimming

5 ATM water resistant up to 50m.
Recognizes 5 different swim styles.
Records 12 data sets including swimming
pace and stroke count.

Running

Tracks your pace and step count.
Maintain a safe workout, whether you're running short or long distance.

Power walking

5 core data sets.
Helps you improve power walking efficiency.

Battle ropes

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.

Cycling

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.

Sleep
monitoring

Accurately tracks sleep quality. Tracks heart rate during deep and light sleep. Helps you adjust your sleep patterns.

Wristband
alarm

A light vibration gently wakes you up for a more comfortable morning.

Mi Fit app

Records your heart rate, sleep patterns and other health data to help you get the most out of life.

A POWERFUL
TRANSFORMATION

24/7 Heart rate monitoring keeps you safe and healthy.

Idle alerts

Stay active as you get reminders to get up and get moving.

24/7 Heart rate monitoring

Safeguard your health at all times.
Alerts you when your heart rate is too high.

AN ENDURING TRANSFORMATION

Stays by your side for 20 days on a single charge.

* Water resistant up to 50m. Water resistance is in accordance with GB/T 30106-2013 standard. Testing performed by the National Quality Supervision and Inspection Center for Watches. Mi Smart Band 4 water resistance report code: QT1902005;
* Mi Smart Band 4 lasts up to 20 days on a single charge according to Huami Laboratory testing: Tested using default settings, with 30 minute automatic heart rate monitoring enabled, receiving 100 notifications per day, 2 alarms per day, vibrating for 5 minutes, touching the touch button 10 times per day, and syncing with the app once per day. Actual results may differ due to to differences in environment, use and settings.
* "39.9% larger display size" is in comparison to Mi Band 3. Mi Band 3's display measures 17.26mm in length and 9.66mm in width. Mi Smart Band 4 measures 21.6mm in length and 10.8mm in width. Calculated as (10.8*21.6-9.66*17.26) / (9.66*17.26), the Mi Smart Band 4's display is 39.9% larger than Mi Band 3's display.
* Images are for reference only, font may be slightly different from actual product.
DESIGN
specifications
Weight
22.1g
Water Resistance Rating
5 ATM
Display Type
AMOLED
Screen Size
0.95''
Resolution
120 x 240 RGB
Colour Depth
24 bit
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
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, 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 x1
Wrist strap x1
Specialised charging cable X 1
User guide x1