Lookatool Smart Wrist Band Sleep Sports Fitness Activity Tracker Pedometer Bracelet Watch, Black Compatible with iOS: iPhone4s /5 /5c /5s and iOS 6.1or above , android system 4.3 or above( Bluetooth version 4.0) App to record your path of life and information, power consumption: Normal use for a week, standby for three months Reminder/call reminder/message reminder iOS system unavailable) Tracker steps/distance measurement/calorie consumption management/sleep cycle/time display Lookatool is the only designated sellers for Lookatool, make sure you buy from Lookatool