Garmin GPS 24xd HVS GPS Antenna w/Heading Sensor - NMEA 0183 [010-02316-00]GPS 24xd HVS GPS Antenna with Heading Sensor NMEA 0183 The GPS 24xd position receiver and antenna gives you precise location with multi band GNSS and heading accuracy even at slow speeds. Features: Navigate in more locations with expanded GNSS support Get high sensitivity tracking with fast GPS update rate Accurately pinpoint your heading regardless of speed Its water resistant (IPX7) to withstand the elements Install it easily with multiple mounting