A multisport, swim-proof GPS watch, ideal for triathletes and dedicated athletes. Forerunner 310XT has a 20-hour battery life and is waterproof (IPX7), making it an indispensable training tool. With a high-sensitivity GPS receiver and HotFix satellite prediction, Forerunner 310XT locates your position simply, quickly and precisely and maintains its GPS location even in heavy cover and near tall buildings and trees.

• Waterproof to 50m (165 ft.), Forerunner 310XT is an ideal training tool for triathletes and swimmers who want speed and distance data in open water or outdoor pools
• Forerunner 310XT features a new advanced calorie-consumption formula that calculates calories burned based on micro changes in the user's heart rate during aerobic activity
• GPS satellites accurately calculate speed, distance and pace information; GPS receiver provides rapid first fix and is sensitive enough to acquire signals under cloud cover. Navigation capabilities let you mark locations, find locations or navigate back to the starting point
• Wireless chest-strap heart rate monitor helps you train in your target zone to optimize performance
• ANT+ wireless technology allows the Forerunner 310XT to communicate with other ANT+ enabled devices, such as PowerTap, SRM and Quarq power meters (not included). It also lets you automatically transfer data between your computer and Forerunner without even taking the watch off; compatible with Mac and PC computers
• Use the Garmin Connect community website to track your time, speed, distance and calories burned; store and share routes with other Forerunner users on the website. It also allows users to categorize and design workouts based on activity—prior workouts can be saved by day and week designations
• Wireless data transfer can be used to send courses, goals and workouts from your computer to the Forerunner 310 XT before heading out for a jog. You can also share workout information and compete against other users' recorded courses by wirelessly transferring data to other Forerunner 310XT units nearby
• 20 hr. battery life provides accurate pace, speed and distance data for ultra endurance athletes
• Optional foot pod (sold separately) transmits speed/distance data without the use of satellites, so the Forerunner 310XT can also be used indoors
• Forerunner 310XT tracks your cycling workouts when paired with a GSC 10 Speed and Cadence Sensor, sold separately
• Includes: 310XT wrist unit,USB ANT stick, AC adapter, charging clip, owner's manual and quick reference guide