Product description Compatibility: This Antenna Compatible with the following GARMIN GPS units: GPSMAP 392 GPSMAP 421 GPSMAP 421s GPSMAP 430X GPSMAP 431 GPSMAP 431s GPSMAP 440 GPSMAP 440X GPSMAP 440SX GPSMAP 441 GPSMAP 441s GPSMAP 521 GPSMAP 521s GPSMAP 526 GPSMAP 526s GPSMAP 531 GPSMAP 531s GPSMAP 536 GPSMAP 536s GPSMAP 541 GPSMAP 541s GPSMAP 546 GPSMAP 546s GPSMAP 555 GPSMAP 555s GPSMAP 620 GPSMAP 640 GPSMAP 720 GPSMAP 720s Features: Brand New 3 Meters GPS Antenna Active Gain for better signal Built-in Powerful Low Noise Amplifier Magnetic Base Compatible with almost all GPS with BNC plug Specification: Dielectric Antenna Center Frequency 1575.42MHz±3 MHz V.S.W.R 1.5:1 Band Width ±5 MHz Impendence 50 ohm Peak Gain >3dBic Based on 7×7cm ground plane Gain Coverage >-4dBic at –90°
