Water resistant Nike+ SportWatch features TomTom GPS for accurate speed and distance information, indoors or out--even if the GPS signal gets interrupted 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 Personal coaching features help keep you at your best--reminds you to run, stores your run history, and remembers your personal
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