Sports Mode: Running, Walking, Cycling, Indoor Running, Swimming, Training, Sports

Health Monitor: Steps achievement, Target setting, Sleep monitor, Hand movement monitor, All day heart rate, Idle heart rate, activity reminder
Other features: Alarm, watch faces setting, screen lock, timer, stop watch, disconnect notification, apps reminder, call and sms notification, calendar reminder, weather, find my phone, unlock phone, Do not disturb mode, night mode.
 
Mi Band 4 can last up to 20 days on a single charge is according to Huami Laboratory testing 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.