1. Be compatible with Bluetooth version 4.0, Android (OPERATING SYSTEM 4.4 or above); for iphone (iOS 8.0 or above)

2. Waterproof IP68 means step by step not to exceed one meter deep and maceration time should not exceed 30 minutes

3. Please search "GloryFit" in Apple Store or Android Market to download Application

4. Filling the wristband takes about 1-1.5 hours

5. Bluetooth connection range is 8 meters