This is the simplest portable GPS locating device available, ideal for finding your car after shopping or your hotel after a day of touring in an unfamiliar city. Simply push a button when you leave your car or a hotel and the device marks the location and points the way back. Half the size of a cell phone, the compact receiver fits easily on a keychain, in a pocket, or in a purse. Unlike typical GPS units that are highly complex, this one only has two buttons: one for switching your compass mode, another for setting up to three starting points. It uses an advanced GPS receiver chipset that provides a high degree of accuracy—within five yards—in urban canyons or heavily forested environments. It counts down the distance (in yards, miles, meters, or kilometers) as you approach your starting point and its self-calibrating digital compass displays your heading in degrees and indicates direction with an easy-to-read arrow. A backlight button illuminates the display for easy reading in low light conditions. It also remembers your waypoints when powered off. Best in outdoor conditions. Weather resistant. Requires two AAA batteries. 3 1/4" L x 2" W x 3/4" D. (2 oz.)