Timetec GPS Antenna for Roadhawk DC2/HD Car Vehicle Dash Cam Blackbox DVR (GPS Antenna) Timetec GPS Antenna for Roadhawk DC2/HD Car Vehicle Dash Cam Blackbox DVR Spare GPS antenna for the RoadHawk HD Dash Camera system /Also compatible with RoadHawk DC-2 camera. For best results, mount this antenna externally with a clear view to the sky. You only need to plug in the external GPS antenna if you have difficulty receiving a clear GPS signal in your vehicle. Fully waterproof and with magnetic base.