Dive in with the Garmin Forerunner 310XT GPS Watch. Whether you’re camping or training for a triathlon, the Forerunner 310XT tracks your training stats or hiking patterns and sends them to your computer. Waterproof up to a depth of 50 meters, this Garmin GPS watch has a battery life of 20 hours and pinpoints your position precisely with GPS satellite data. Thanks to its high-sensitivity HotFix satellite prediction, the Forerunner 310XT can track your movements in the densest of forests. satellites quickly and tracks your movement even near tall buildings or under tree cover. Pick one up for $349.99. Garmin.