Garmin’s rugged Forerunner 310XT is an essential fitness training tool – it’s a GPS-enabled, water-proof trainer that tracks bike, run, and swim data. It sends that information wirelessly to your computer when in range. The data is ready for you to analyze to improve your performance. This multi-sport device has up to 20 hours of battery life, water proof up to 50 meters, tracks distance, pace and heart rate and fits nicely on your wrist.