Yescrown Bluetooth Smart Bracelet I5 Vibrating Alarm Calories Count Sports Tracker Watch Waterproof TPU Wristband for IOS Android Smart Phone (Black) Light Weight;Touch design;Waterproof IP67;Cloud social circle interaction;Set your goals and sync your status Diaplay the time, steps, distance and calorie clearly. Let you know your sports data right now! Gesture control to show time, excellent experience like a watch;You can wear it whole day and night. It is your best activity companion! Built-in silent vibration mode, a silent remind alarm that gently vibrates to remind you at your desired time without disturbing your partner. When bluetooth paired, it can automatically sync your data to other devices, such as iphone 4S,5,5S, ipod touch5, etc. (OS must be IOS 7.0 or later); Samsung S4, Note 3, etc. (OS must be Android 4.3 or later, bluetooth must be 4.0).