Main Features:

Heart rate monitor: 1S with optical heart rate sensor, shows you heart rate with PPG, you can see the results more intuitively.

30 days standby time: Top-level Bluetooth chip and military gravity sensor ensure 30 days ultra-long standby time for a full charging.

Call reminder: Mi Band 1S will tell you when a call comes, you never need to worry about missing any important calls.

Sports tracking: Track your sports, record steps, distance and calories, help you achieve your sports target. 

Sleep monitoring: Let you know your deep sleep and shallow sleep, also APP will give you periodical evaluation, help you develop good living habits.

Silent alarm: Wake you up every morning, will not be late for work; Remind you with vibration, never worry about missing anything.

Free password to unlock the phone: Forget complex unlock password and gesture, simply raise your hand to close to phones, immediate and safe unlocking.