• 10 days standby time: Top-level Bluetooth chip and military gravity sensor ensure 10 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

• 10 days standby time: Top-level Bluetooth chip and military gravity sensor ensure 10 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. 

Compatability: Android 4.4 / iOS 7.0 and above system 

Battery Type: Lithium polymer battery Battery Capacity: 45mAh Standby time: About 30 days

Functions: Measurement of heart rate,Sleep management,Call reminder,Calories burned measuring,Steps counting,Distance recording,Alarm Clock Alert type: Vibration

Package Contents Package Contents: 1 x Xiaomi Mi Band 1S Smart Watch, 1 x Manual, 1 x Charger, 1 x Box