Iuhan&reg; Fashion JW86 Smart Bracelet bluetooth4.0 sport smart bracelet sleep heartrate For Phone (Black) The heart rate sensor on the back case monitors your heart rate variation 24 hours a day Keep track of your everyday activities via pedometer, calorie calculator, sleep monitor, and more Vibrate to notify you of incoming calls, text messages, alarm, and notifications from social apps Please notice that it requires Bluetooth 4.0 and is only compatible with iOS 7.0 or above and Android 4.3 or above Package Content: 1 x Heart Braclet 1 x User Manual 1 x Charging Back