CEStore Ultra Light Wireless Bluetooth 4.0 I5 Wristband Smart Watch w/Health Sport Monitoring/Pedometer/Sleep Monitoring/Sedentary Reminder/Call ID Display for Android iOS Smartphone (Black II) Fashion Design - Host material ABS, TPU strap material, using medical grade hypoallergenic material and adjustable snap strap, the size can be adjusted according to the size of the wrist, more comfortable to wear, ultra light weight, 0.49 OLED screen display Sport Monitoring - Anytime record the number of steps you walk, move distance and calorie consumption, so you real-time monitoring their movement index, based on your height, weight and other parameters accurately calculate calories burned. Each day record 288 set data, exactly know yourself Sleep Quality Monitoring - According to your sleep quality, calculate the depth and shallow sleep time, so you have targeted to improve their living habits, 8 groups silent alarm, in the case without disturbing the family, time to wake you. Sleep mode, thack your sleeping quality, tracks steps, distance, calories burned and monitor, wakes you (and not your partner) with a silent wake alarm Bluetooth & USB & PC Data Synchronization - Bluetooth 4.0 low-power wireless data synchronization, syncs via iOS and Android(APP). Automatic standard USB, can be directly charged with computers, mobile power USB port, easy to quickly add capacity, can synchronize data and PC support Windoos XP, Vista, Win7, Win8 system IP55 Protection Grade - Waterproof skills with good rains, when they do not wash their hands off, but can not be putted into water