Designed for Healthy Life: Steps Counting，Calories Burned Measuring， Sleep ManagementIP-X6 WaterproofComfortable Wear: The device is very comfortable to wear as it is made of soft silicone and is very smoothEasy to Use: The tracker is very easy to use. You simply tap on the screen and use finger gestures like swiping， double tapping， etc.Fit For: iphone 4S or above (iphone 4S， iphone 5， iphone 5S， iphone 5C， iTouch5， ipad3， ipad4， ipad air， ipad mini etc IOS 7.0 or above system) Android 4.3 or above， Bluetooth 4.0.