Marine GPSmarnie Antenna is total water-proof, very suitable for any marine receiver and transponder...High sensitivity; Hign Gain; Low VSWR Marine GPS 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° <0+<90° (over 75% Volume) Polarization RHCP LNA/Filter LNA Gain(Without cable) 38dB Typical Noise Figure 1.5dB Filter Out Band Attenuation (f0=1575.42 MHz) 7dB min f0+/-20MHz; 20dB min f0+/-50MHz 30dB min f0+/-100MHz V. S. W. R < 2.0 DC Voltage 3V, 5V, 3V to 5V DC current 10mA MaxMechanical Weight < 140 gram Size Ø 96× 126mm Cable RG58 8 to 100 meters Connector SMA/SMB/SMC/BNC/FME/TNC/MCX /MMCX Mounting screw(M24× 1.5)connect Housing whiteEnvironmental Working Temp -40° C +85° C Vibration Sine sweep 1g(0-p)10 50 10Hz each axis Humidity Humidity95% 100%RH Weatherproof is good