The iHealth Wireless Activity and Sleep Tracker is a device that tracks your daily activity and sleep. It uses Bluetooth 4.0 with low energy techonology and is sweat, rain and splash proof. Each Tracker comes with two color options for wristbands and waist clips. This Tracker, along with the free iHealth MyVitals app, can keep you motivated and help you stay on track to a more active and healthier lifestyle.