Garmin PC Interface Cable with Cigarette Lighter Adapter Garmin GPS 12 (Part No. 010-10164-00) Connect your Garmin GPS receiver to your PC and keep it powered when batteries are low Create routes and waypoints on your PC and transfer them to your GPS Download map detail from MapSource CD-ROMs to compatible units PC cable features a standard 9-pin D connector Works with GPS 12 model (but not 12XL, 12CX, or 12MAP)