Niceboy X-fit GPS is an incredible featureful sport tester/smart armband. Built-in GPS tracker with its own 7-day memory. 22 sports activities to choose from. Precise measurement of your route, pace, calories burned; direct measurement of your heart rate and more sports data. A cleverly arranged device with detailed analysis of activities in English (e.g. pace by kilometres, heart rate graph and more). Daily monitoring of steps, distance, calories burned or sleep. All on a large, colour, almost one-inch OLED display. The armband is also fully waterproof and dust resistant (IP67) and can last up to 10 days without charging!