The Bushnell Backtrack utilizes GPS technology to help you find your way back to your car or base camp at the end of the day. It has only 2 buttons, making it extremely easy to use, and stores up to 3 locations. It is also weather resistant, lightweight and compact and runs on 2 AAA batteries (not included). At the end of the day the Backtracker will point you where you want to go. All you need to do is push a button. Weighs approximately 4 ounces without batteries.