Main Features:
- Bluetooth Synchronization
With Bluetooth 4.0, this smart watch is available for smartphones with Bluetooth functions.
- OLED Touch Screen
Just touch the circular button gently, the OLED screen will display current time, steps, heart rate, distances, calories, etc. 
- Heart Rate Monitor
It can dynamic-static monitor your heart rate, provide data for you at any time.
- Incoming Calls / APP Message Alert
When someone calls or sends any messages in your phone, the watch will remind you via vibrating, so you will never miss them!
- Sleeping Monitoring
Accurately monitor total effective sleeping time and motions time every night, also APP will give you periodical evaluation.
- Sport Monitoring
Record steps, calories and distance. Let you know your sports data, adjust your exercise program and get a healthier life!
- Intelligent Alarm Function
Wake you up every morning, will not be late for work; idle alert to remind you with vibration, stretch your legs after working for a long time.
- No Passcodes Required
Every Mi Band 2 have an exclusive ID, when your smartphone closes with the band, your phone will be unlocked, just identify yourself with Mi Band 2. 
- IP67 Waterproof
The IP67 waterproof allows the bracelet to be held in the water for a maximum of 30 minutes at a depth of 1 meter. ( Don't wear the bracelet when diving )
- Full Compatibility
Support Android 4.4 or above and iOS 7.0 or above with Bluetooth 4.0.
- Download the APP
You can search the name "MI FIT" in the "App Store" or "Google Play" to download the APP 
.