Search icon
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

  • A single charge lasts
    up to 20 days.

  • Health

  • 24/7 heart rate
    and sleep tracking.


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.

Your personal trainer is with
you every step of the way.

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.

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

Power walking
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.

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.

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.

Idle alerts

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

Stays by your side for 20
days on a single charge.
; ;
  • * Global Number 1 Company in wrist-worn wearables Source: IDC Worldwide Quarterly Wearables Tracker, wrist-worn devices only, by shipment volume, Q1 2019.

  • * 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.
Home Products Discover Account