Magellan RoadMate 760 360 Lowrance iWay 500C, AirMap, GlobalMap 1600 LMS 160, Thales MobileMapper Pro & CE, ProMark 2 & 3 - External GPS Antenna (SMB-F) Amplified (active) GPS antenna to enhance and improve GPS signal reception. Built-in magnets for mounting on car rooftops or other metallic surfaces. Built-in permanent mounting holes for mounting on aircraft fuselage, boat surfaces or car/RV/SUV vehicle surfaces.