Compact and durable design,high quality metal materials which is better for receive and transmit [Excellent Signal boost]Improve the reception and transmission of your CB radio,Significantly boosting the signal of your radio,extend the talk distance Compatible for CB radios model: for Cobra HH50WXST HHRT50 HH50 C75WXST HH 38 WX ST; for Midland 75-822 75-785 MHS75; for Uniden BC75XLT PRO401HH PRO501HH PRO501TK BC125AT [ELECTRICAL SPECIFICATIONS]Frequency: 27MHz; VSWR: ＜1.5; Gain: 1.8dBi; Maximum Power Input-watts: 20W; Impedance:50Ω; [MECHANICAL SPECIFICATIONS]Termination: BNC; (If you need TNC antenna, please check B0BFCK2F15); Material: Stainless steel; Height: 9”(23cm)/51”(130cm); Weight: 0.08kg Packing includes: 1*27Mhz CB Antenna