Great and slim looking waterproof sports brace that tracks all-day activity, like steps, distance, sleep monitoring and calories burned. Wear it at night to measure your sleep quality and wake with the built in alarm clock. The data can be read from your connected smartphone or tablet. Day or night, the Fit Brace fits comfortably around your wrist and has a 25 day batterylife. Support System: Android 4.3 and iOS 7.0 or above. Including usb charging cable.