[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); Radome Material: Cu; Height: 9.8”(25cm)/52”(132.5cm); Weight: 0.08kg 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 CB-Way Radios Packing includes: 1*27Mhz CB Antenna