Bluetooth Watch Android iPhone, GOTD Waterproof Bluetooth Smart Watch WristWatch,M5S Heart Rate Monitor IOS iPhone 6S Plus 5S, Samsung Galaxy S7 S6, Note 4,Nexus 7 10, HTC One, One 2(M8) (Green ) Waterproof Standard: IP54 Charge:5V USB jackcharge by PC USB Watch Band Length:155mm-210mm Step count, distance, calorie consumption management, sleep management, time display, event reminders (water, medication, meetings, etc. Custom), call alerts,message alerts, clock display, sedentary reminder, vibration alarm, remote self-timer bell . Automatically sync data via Bluetooth 4.0 with Android 4.3 above smart phones (such as Galay S4,Galay Note3 etc.)and other IOS7.1 or above iphone