Get the most out of your workouts and daily activity by tracking your stats with the trendy, large Fitbit Charge HR Wireless Activity Tracker in black. The Charge HR is a high-performance wristband that delivers real-time stats like steps taken, distance travelled, calories burned, floors climbed and active minutes. The Charge HR uses the proprietary PurePulse optical heart rate technology to constantly measure your heart rate. It also features Caller ID so you can stay connected, and a sleep tracker and silent alarm to make sure you're getting the right amount of rest. Activity Tracker Features Fitness tracking wristband Colour: Black Size: Large Track heart rate with PurePulse optical heart rate technology Track steps, distance, calories, floors climbed, active minutes, sleep Caller ID & silent alarm included Includes wristband tracker, wireless sync dongle and charging cable Fitbit Service Policy: 30 day refund or exchange on unopened product. After 30 days, warranty and service of your product will be handled solely by Fitbit.