Monitors heart rate at the wrist all day and night, using ElevateT wrist heart rate technology. Built-in GPS tracks how far, how fast and where you run, walk or ride. Battery life up to 5 days in smartwatch mode and 8 hours in GPS mode. 23.5 x 23.4 mm (0.93" x 0.93"). 35.5 x 40.7 x 13.4 mmFits wrists with a circumference of 140-200 mm.Includes VO2 max estimateAll-day activity tracking. Big Papi Savings was created with a vision in mind. A vision that all people deserve to feel the magic and wonderment of receiving items that will give them pleasure. Thanks for your visit and happy shopping! Please message us for details if needed. "Item arrived quickly, no issues, will trade again for sure ". This item is in the category "Sporting Goods\Fitness, Running & Yoga\Fitness Technology\GPS & Running Watches". The seller is "bigpapisavings" and is located in this country: US. This item can be shipped worldwide.