Workman SWR-2T CB Radio Antenna SWR Meter W/ 3' RG8X (Mini 8) Coax Jumper Cord Frequency Range 27 MHZ SWR 1:1 to 1:3 52 ohm impedance SO-239 Input and Output Connectors W/ Heavy Duty Metal Case Comes With 3' 95% shielded, gray cable with 4-point soldered Astatic PL-259 connectors