Realwo I5 Bluetooth Smart Wristband Bracelet Sleep Monitor and Sports Fitness Activity Tracker Caller ID display Key Switch for iPhone Galaxy Lg G3 Build-in integrated Bluetooth 4.0 and 3D accelerated sensor, with APP and PC cloud service,track your daily activity: steps, calories and sleep faithfully. Vibration alarm clock, support vibrate function, wake you up in silence. Sedentary remind, Monitor if user sedentary for a long time, the bracelet will vibrate to remind user to move. Calling and SMS notify, Support coming calling and new message notification function. IP55 grade water resistance design, 4~6 days battery life time.