The Bushnell BackTrack Original G2 Digital Compass (Green) is a personal location finder and digital compass utilizing GPS technology that lets you know where you are all the time. The BackTrack stores up to three locations - just mark it and forget it until it's time to return. At the end of the hike, select your location and the BackTrack displays direction and distance. Use it to find your car in a crowded parking lot, your tree stand, secret fishing spot, trailhead, campsite or the rendezvous place with your group. A self-calibrating digital compass and a backlit LCD are built in. The BackTrack can be used over 130 times or in excess of 20 hours on 2 user-supplied AAA batteries. Extremely compact and light at just 5 ounces, this GPS personal location finder stows conveniently in your pocket, pack or purse.