Lookatool&reg; Smart Wrist Band Sleep Sports Fitness Activity Tracker Pedometer Bracelet Watch (Deep Blue) Compatible with IOS: Iphone4s /5 /5c /5s and IOS 6.1or above . Aadroid 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.If you purchase here but receive product from other sellers,please help us report to Amazon Customer service for copyright infringement of Lookatool brand product.Thank you very much in advance!