Description: Sleep tracking,recording sleep duration via phone app, recording sleep paerns. IP65 water resistant,resistant to water dust sweat shower or wash hands without removing. Data recording,when you are running,it will record your steps and distance,make customized schedule to improve finess effect. Smart bracelet is compatible with for Android phone (above 4.3) for iOS phone (above for iOS 7.0),10days using time once fully charged. Powerful fitness tracker: Step counter,distance, measurement of calorie consumption, sleep tracker, smart alarm.