The Tracking Key is a small, pocket sized device that receives signals from the twenty-four Department of Defense satellites orbiting the earth. The internal computer accurately determines the location of the device within 2.5 meters and records this data every second. With this data and the included Tracking software, you can accurately determine where a person traveled, how fast they drove, where they stopped and for how long. The recorded data from the Tracking Key can be displayed over a street map, satellite images or in a text report. The Tracking Key is powered by just 2 AAA batteries and can be placed inside, outside and even underneath the vehicle. The strong magnet mounts allows for instant mounting. The Tracking Key is also waterproof so you do not have to worry about the elements. Simply put, the Tracking key is an extremely affordable GPS vehicle tracking system that records driving information. Think of it as a video recorder for vehicle travel activity.