When the terrain is tough, when the weather turns, when you need accurate bearings to guide you, the new Polar AXN500 Outdoor Computer will get you there and back again. We've taken all of the features of the Polar AXN300, added in a compass for directional information, superior comfort of the WearLinkT fabric transmitter, and a sleek stainless steel design.Polar exercise featuresWireless ECG accurate heart rate.Polar OwnCal®.Polar Fitness Test.Polar OwnCode®