Waterproof Design for on dash or roof mount with its built in magnetic base * High Gain 28 Db amplifier built in to give best possible GPS signal reception * Longer 8 foot cable for easy routing of cable around corners for reduced wire visability * Exteral GPS antennas let you mount your GPS screen in any convenient location in your car with better reception then built in factory antenna * Unit is compatible with GarminiQue 3600, StreetPilot 2610 & 2630, GPSMAP series, GPS 76 series, 12XL & emap.