Signal Boost: 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: 50Watt / Length: 40.5inch / Gain 3dBi / Connector: PL259 (UHF-Male) / V.S.W.R: LESS1.5 / Polarization:Vertical Work for Yaesu Midland Cobra Icom Uniden and other CB mobile radio transceivers Durable anti-corrosion, long service life Note: 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: 50Watt / Length: 40.5inch / Gain 3dBi / Connector: PL259 (UHF-Male) / V.S.W.R: LESS1.5 / Polarization:Vertical