Finally, a GPS-enabled training device that isn"t afraid of the water. The rugged Forerunner 310XT is the triathlete"s indispensable training tool - a GPS-enabled, swim-proof trainer that tracks bike and run data and sends it wirelessly to your computer. This multi-sport device has up to 20 hours of battery life, tracks distance, pace and heart rate (optional), and goes from wrist to bike in seconds. Package includes: Forerunner 310XT, premium heart rate monitor, USB ANT Stick, AC adapter, charging clip, owner"s manual on disk, quick reference guideCompatible with cadenceAdvanced heart-rate based calorie computationMultisport: changes sport mode with a press of a buttonHigh-sensitivity GPS receiver with HotFixWater resistant to 50 metersEasy-to-read displayTraining and motivational features: Virtual Partner, courses, workouts, goalsGPS features: mark locations, back to startANT+ wireless technology: lets you automatically transfer information back and forth between the watch and the computerBattery life: up to 20 hours, typicalRechargeable lithium-ion battery lasts over 1,000+ chargesItem SpecificationsColorGrey/OrangeHeart RateIncludedGPS-EnabledIncludedCadenceOptional