Fit is not a destination, it is a way of life. Join moreFit, to be more fit. Compatibility: APP for Andriod(4.4 or above os): Veryfit for heart rate, available from Google Play. APP for IOS(ios 7.1 or above os): Veryfit for heart rate, availble from Apple Store. Package Include: 1 x H4 Heart Rate Tracker 1 x USB charger 1 x User Manual FAQ: Does not work? A: 1. download app veryfit for heart rate from apple store or google play. 2. turn on phone bluetooth, go to the App=>>Device=>>Bind Device, then search and pair the device with your phone. 3. once it paired correctly, the bracelet vibrates, the time on the bracelet will be auto synchronized with phone's. Q: Can't pair the device? A: 1. check phone bluetooth list, forget all device ever connected. 2. go to app=>>device=>>unbind device, unbind it. 3. turn off app then turn back, restart bluetooth and pair from app again. Q: No history data? A: On the app Home page, drag it down slowly to release refresh till it shows 100% synced. Click the arrow under Today to choose a history date, then click "go to the day". Q: Step not accurate? A: Please enable Sports Mode when go for peak exercise: long press the side key for 8 seconds till it shows 00:00.0, then double click to start monitoring. It will help to get more accurate countings. Q: How to cut it off? A: unbind the watch with your phone first, then press the side button(about 8 seconds) till a car icon comes to turn it off. Q: This activity bracelet will not stay charged. The charge only lasts for one day. A: The device needs to be charged for 1-2 hour, a full charge lasts for 5 days or more. Please check whether it's fully charged on app=>>device=>>battery status.
||130 x 380 x 400