Highlights Tracks Steps, Distance, and Calories Burned Large Tap Display Wireless Synching Zip makes fitness fun by tracking steps, distance, and calories burned then automatically sync the data to your Fitbit account. Whether online or through the Fitbit App, you can set goals, track progress, earn badges or connect with friends for support or friendly competitions. Your stats upload wirelessly via computer or select mobile devices. Discreet, Versatile Wear Sweat, Rain, and Splash Proof Long Battery Life - Up to 6 Months Material: Plastic Weight: .11 kilograms Battery Charge Life: Up to 25 Hours Wireless Technology: Bluetooth Connectivity: USB Operating System Compatibility: Android, Apple iOS Activities tracked: Calories Burned, Daily Distance, Total Steps, Trip Distance Battery: 1 Lithium ion, Required, included