LandAirSea Magnetic Wireless Pocket-Sized GPS Tracking Key Pro System with BONUS Cigarette Lighter Adapter Small pocket-sized design allows for portability and covert placement GPS tracking accuracy of 2.5 (7 feet) of the device Powerful magnet mount allows for installation inside, outside or underneath the vehicle Logs the driving speed every second, showing the maximum speed driven for the day The data is compatible with the popular Google Earth application