Nike+ SportWatch GPS Powered by TomTom (White) Track your time, distance, pace, heart rate (with optional sensor), and calories burned; view your mapped route with pace data/changes in elevation on Nikeplus.com Rechargeable lithium polymer battery charges via USB, provides eight hours of run time with the GPS and sensor both turned on, up to 50 days of standby power Join challenges and connect with friends as a member of Nikeplus.com-view/share routes, find popular running areas, share activity on Facebook or Twitter Track your time, distance, pace, heart rate (with optional sensor) and calories burned; view your mapped route with pace data/changes in elevation on Nikeplus.com Rechargeable lithium polymer battery charges via USB, provides eight hours of run time with the GPS and sensor both turned on, up to 50 days of standby power Join challenges and connect with friends as a member of Nikeplus.com-view/share routes, find popular running areas, share activity on Facebook or Twitter IMPORTANT NOTE: Please download the manual below the product descriptoin to know the complete functionality of the product