For use with your etrex, emap or Geko (201 and 301 models only) GPS handheld systems, the Gilsson E3C combination 12v/pc cable allows you to transfer such data as your waypoints and/or detailed mapping to and from your pc while powering your handheld system via a 12 volt adaptor port. Its structure displays a rugged serial connection including screws at the connection point to your pc for additional strength and support. Comparable to Garmin part number # 010-10268-00