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
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.

  • 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.

  • 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.

  • Running

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

  • Swimming

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

  • Power walking

    5 core data sets
    Helps you improve power walking efficiency

A REINVIGORATED TRANSFORMATION

Improving your daily energy starts with
understanding your sleep patterns.

Sleep monitoring

Accurately tracks light and deep sleep
as well as heart rate during sleep
to help you adjust your sleep patterns.

Wristband alarm

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

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
monitoring

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

Idle alerts

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.

NOTE:



  • * 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.