This logger is compatible with the V1 and V1P. When attached to your camera, it will record the speed and location of your vehicle and make the information available via the playback software on your computer. (Which comes with the device) Rexing GPS Logger for Rexing V1 and V1P. Speed Stamp on the Video Footage. GPS Route Tracking in Google Maps. Including Software CD for Playing Video Footage with Embedded Information.Please go to RexingUSA website and update your dash cam to latest firmware before attach the GPS Logger.