Please follow my instructions:
1.heart rate monitor : the wristband need switch to Heart Shaped graph mode, then you can see activity data in APP.
2.sleep recording: the sleep data generated at night on the bracelet can be synchronized to your smartphone APK via Bluetooth connection on the next day. If the sleep mode is enabled by default from 21:00 to 9:00 of next day.If the sleep tracking starts before 0:00 at night, the bracelet is displayed the same sleep date; if the sleep tracking starts later than 0:00 am, the sleep date is marked as next date. The data sync is based on bracelet binding with APK.
Heart Rate Sensor: LST1303
Screen type: 0.42 inch TFT high-definition OLED
Weight: 20g (band only)
Bracelet Length: 9.64 inch
Band material: TPE
Battery capacity: 70Mah large capacity polymer batteries
Battery type: large polymer lithium battery
Sync method: Bluetooth 4.0
Work time: 20 days
System: Support Android and IOS
APP language: English
Standard Sports Function (steps, distance,calories)
Sleep Quality Monitor
Heart Rate Monitor
Message Push (incoming call, message, facebook etc)
Smart alarm clock
Lift wrist to view info
1 x Fitness Tracker Bracelet
1 x Packaging Box
1 x Charging Cable
1 x Instructions
1.Do not puncture the device.
2.Do not expose the band to solvents such as benzine ,thinner.
3.Do not expose the band to strong magnetic field an electric field.
4.Do not leave the device exposed to a heat source or in a high- temperature location, such as in the sun in an unattended vehicle.
Multi-Functions: heart rate monitoring, calories record, step pedometer bracelet, Call/SMS/Facebook reminder, sleep quality monitoring, distance track, gesture control, alarm, daily reminders, anti-lost, anti-rao
0.42 inch TFT High-definition OLED, 70Mah large capacity polymer batteries, Machine size:1.77 x 0.78 x 0.41 inch, Strap size:9.64 inch, Fitness tracker watch weight: 20g
Waterproof IP67 Fitness Tracker Bracelet: daily wear, unrestrained. easily deal with all kinds of daily life, such as washing, swimming, rain. The band is made by TPE leather and is zero sense and comfortable to wear when you are working or sleeping
Upgraded Battery Version: you need not removed off the strap, adopted with back clip charging method,auto power-off, it is convenient,easy and safe to use; 1 hour charging can offer you 15 days of standby time, takes 2 hours to charge,you can enjoy more than 20 days of daily use
Compatiable Smart Phone: IOS 7.0 version above or Androld 4.3 version or above with Bluetooth 4.0 support