Rexing M3 Charger with GPS Logger When connected to a Rexing dash cam, the speed and location of your vehicle will be stamped to your videos as you drive. You can then access this information while playing back your recordings using the free GPS Logger desktop software. Features: USE - Plugs into cigarette lighter (accessory) port LENGTH - Includes 13ft Dash cam charging cable COMPATIBILITY - Compatible with M3 only IMPORTANT METRICS - Gives you the option to record your when, where, and how fast you were traveling with several metrics that can prove to be highly useful in reporting a driving incident. MAP YOUR JOURNEY - See your exact path taken, playback your recordings with highly detailed location and speed information using our free GPS Logger software.