The vivosmart HR+ takes all the innovative features and technology of the vivosmart HR activity tracker, adding GPS to map out your walk or run. The sleek design of the band offers comfortable all day wear in the water, in bright lights or at night in bed for sleep monitoring. Smart notifications alert you on incoming calls, texts, emails and calendar events so you can stay connected. Auto sync with your mobile device when you meet your goal and share your data with Garmin Connect. OLED touchscreen allows you to swipe and check your data at a glance so you can stay focused on hitting your daily target. With 7 days battery life you don?t need to worry about it running out while you're on the go. Charging once week should be enough for the average wearer.. Material: 100% Plastic