1,Built-in GPS Antenna with 28dBi Gain, RHCP Polarization and 50 Ohms Impedance 2,IPX connector 3,GPS antenna 1,Built-in GPS Antenna with 28dBi Gain, RHCP Polarization and 50 Ohms Impedance2,IPX connector3,GPS antennaFrequency: 1,575.42 ±3MHz VSWR: less than 1.5 Gain: 28dBi Polarization: RHCP Input impedance: 50 ohms Built-in GPS Antenna