Sudroid D21 Fitness Tracker,Touch Screen Accurate Sleeping Monitor Pedometer Smart Band Wireless Activity Wristband (Black) Advanced Fitness Monitor, Pedometer and Calorie Counter are utilized to help you reach your Life fitness goals, EKG/ECG Live Readout to monitor health, Monitor the quality and duration of your sleep with Automatic Sleep Tracking Displays steps, distance, calories, heart rate, floors climbed and activity intensity. Humanized design, with gesture recognition function, You only need to raise and turn your arm when wearing, watch screen will automatically light up Smart phone information notification: Message, QQ, Any time, any place, chat with friends and share the happy time Sweat-proof resin strap and waterproof design perfect for outdoor sports, such as swiming, runing,climbing, cycling, travling ect.