DIZA100 DW64 Wireless Activity and Sleep Pedometer Smart Fitness Tracker Wristband Recording and tracking steps accurately. Measuring your daliy walking distance precisely. Calculating the consumption of calorie, record the daily burn-up calorie. Reminding for dringking, taking, meeting,etc. Bluetooth 4.0,Compatible with iOS 6.1 or above & Android System 4.3 or above.