Forerunner 310XT, HRM with heart rate monitor. 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 trainer that is water-resistant to 164 ft (50 m), tracks data in multiple sport modes and sends it wirelessly to your computer. This multisport device has up to 20 hours of battery life, tracks distance, pace and heart rate on land, and goes from wrist to bike in seconds. You also can track weight, body fat, body water and six other measurements when using the Forerunner 310XT with the Tanita BC-1000 body composition scale. The readings are stored on Forerunner 310XT, then automatically sent to Garmin Connect when in range of your computer. Comes with a USB ANT Stick, AC charger and Charging clip