Improving your daily energy starts with understanding your sleep patterns.
Accurately tracks sleep quality. Tracks heart rate during deep and light sleep. Helps you adjust your sleep patterns.
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.
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.
* 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 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.