Sabuy Wireless Smart Band Fitness Pedometer Tracker Bluetooth Sports Bracelet Activity Tracker with Steps Counter I5S(Blue) Bluetooth 4 low power smart Bracelet, dual-mode control: touch control and time control of two fanwan Pedometer: number of steps, distance, calories record and display Lithium ion battery: 75mAH, working time: 5~7 days (longer battery life).USB charging, 45 minutes can be filled with electricity waterproof grade: IP68; time display function, silent vibration alarm clock APP - App support from store and the application of treasure