Compatible with CB radios from many , improve quality and range to CB radio reception. The antenna works on all channel within CB radio frequency range of 26MHz to 28 MHz(Center 27MHz), No tuning needed Frequency Range: 26-28MHz (Center Frequency: 27MHz);MAX Power: 30W;V.S.W.R: 1.2:1;Impedance: 50 Ohm;Weight: 500g; Antenna Connector: BNC Male;Adapter: BNC Female to UHF PL-259; Compatible with: for PRO505XL or Bearcat 980SSB / 880, for Cobra 19 DX IV, for Cobra HH50WXST HH50 MRHH350FLT C75WXST HHRT50; for :75-822 75-785 MHS75; for : BC75XLT PRO401HH PRO501HH BC125AT; Other UHF/BNC Connector 27MHZ radios suitable for this antenna Heavy Duty Magnetic Base, Stable even with strong winds and high speeds. Easy to install on the roof or trunk of any vehicle and enjoy quality signal reception Color: As Shown Material: Plastic+Metal Package Contents: 1 x Antenna 1 x Magnetic Base 1 x Connector Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.