The HYS CB Antenna can increase the radio signal reception capacity. In addition, due to the high gain, the antenna can also enhance your radio’s signal transmitting ability, can greatly improve the signal transmission distance Frequency: 27Mhz Max Power: 20Watt Length: 16.1inch Connector: BNC V.S.W.R: LESS1.5 Polarization:Vertical Compatibility For Cobra HH38WXST HH50WXST HH50 MRHH350FLT C75WXST Midland 75-822 75-785 MHS75 Uniden BC75XLT PRO401HH BC125AT What you get: 1PCS XP-70 BNC CB Antenna. If you any technical or unsatisfactory problems, plz contact us by clicking “RADIO MAX” that below the "Buy Now", and find the button "ask a question" Frequency: 27Mhz Max Power: 20Watt Length: 31.1inch Connector: BNC V.S.W.R: LESS1.5 Polarization:Vertical