DHT Electronics External GPS Antenna with BNC male for Garmin StreetPilot III, GPS V III+ Sounder GPSMap 178C 188 276C 298c 398c 498c iCOM 270ML 370ML package include:1 x GPS antenna ; antenna cable is about 10 feet DHT Electronics Brand is a Registered Trademark of DHT LLC.Only authorized seller of DHT Electronics can sell under DHT Electronics listings.