About this itemLOW PROFILE GPS PUCK ANTENNA for Devices with External GPS Antenna ConnectorsNARROWBAND L1 FILTER (1575.42 ± 1MHz Center Frequency) Improves GPS Reception (Signal-to-Noise Ratio) and Positional AccuracyPERMANENT MOUNT - Through Hole Screw Mount Design for Vandal Resistant Mounting - No Exposed CableSMA MALE CONNECTOR on 6 ft (2.0 m) of Low Loss Cable - Works with Standard GPS Receiver OutputsLOW NOISE AMPLIFIER - Boosts GPS Signal - 28 ± 4.5dB Gain - Compatible with 3~5V DC GPS Receivers (Passive Gain - 2 dBic Zenith)WEATHERPROOF - IP67 rated - Perfect External GPS Antenna for Car, Truck, Van, Boat or RV - Made in Taiwan