Supports Bluetooth V4.0; 5 modes: activity mode / exercise mode / nap mode / sleep mode / Bluetooth mode; Compatible with Android 4.3 or above version and iOS 7.0 or above version smart phones; The body sensor app can be downloaded from iTunes or Play Store; Smart alert: incoming call alert (only Android 4.3 or above) idle alert alarm (must be set through cellphone APP); Made of medical grade silicone; Power by 60mAh rechargeable polymer Li-ion battery; Standby time: up to 21 days; Comes with 4 colors LEDs; Data storage: maximum 7 days in the band and 1 year in the smart phone; Waterproof grating: IP44