vÃÂvosmart HR smart activity tracker with Elevate wrist heart rate technology measures heart rate at the wrist 24/7. That gives you the freedom to work out with no additional heart rate strap needed. Using heart rate, vÃÂvosmart HR provides calories burned information and quantifies the intensity of your fitness activities, providing better credit for your efforts. You can even use your vÃÂvosmart HR as a heart rate strap on your wrist when paired with other compatible Garmin devices. Product Type: Activity tracker Connectivity: Bluetooth, ANT/ANT+ Supported Host Device OS: iOS, Android, Windows Phone Display: Monochrome - 160 x 68 pixels Input: Touch screen Tracking Data: Distance, time, calories burned, activity, sleep activity, heart rate, steps taken, floors climbed Band: Regular Features: Heart rate sensor, missed calls notification, music remote handling, calendar notification, SMS notification, Email notification, camera remote control, find phone function Battery Run Time: Up to 5 day(s) Color: Imperial purple Dimensions (WxDxH): 0.8 in x 0.5 in Weight: 1.04 oz Manufacturer Warranty: 1 year warranty Product Type: Activity tracker Integrated Components: Heart rate sensor Supported Host Device OS: iOS, Android, Windows Phone Tracking Data: Distance, time, calories burned, activity, sleep activity, heart rate, steps taken, floors climbed Color: Imperial purple Features: Missed calls notification, music remote handling, calendar notification, SMS notification, Email notification, camera remote control, find phone function, accelerometer, altimeter, heart rate Type: Monochrome Resolution: 160 x 68 pixels Dimensions (WxH): 1 in x 0.4 in Wireless Interface: Bluetooth, ANT/ANT+ Type: Touch sensitive screen Technology: Lithium Run Time (Up To): 5 day(s) Size: Regular (fits wrists 136-187 mm) Width: 0.8 in Height: 0.5 in Weight: 1.04 oz Preloaded Software: Alarm Clock Vibrating Alert: Yes Protection: Waterproof Included Accessories: Clip Warranty: 1 year warranty Min Operating Temperature: 14 °F Max Operating Temperature: 140 °F