Xiaomi Mi Band 4 Full Colour AMOLED Touch Display

• 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.

Display: 0.95″ AMOLED Display, 120*240 Pixels
Battery: 135mAh battery compacity, Up to 20 days (Recharging time ~2 Hours)
Water resistance: 5ATM water resistance up to 50m
RAM+ROM: 512K RAM+16MB ROM
Activity Tracking: Count steps, distance, calories burned
Healthy monitoring: 24/7 Heart rate monitoring
Sensor: 3-axis accelerometer, 3-axis gyroscope,
Connective: Bluetooth 5.0
System requirement: Android 4.4, IOS 9 and above

• “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.
• 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.