SWR Test Meter CB Radio Frequency Range 27 MHZ SWR 1:1 to 1:3 / 52 ohm impedance SO-239 Input and Output Connectors Heavy Duty Metal Case Dimensions: 3 3/8 X 2 1/4 X 3 in. Includes: 3' Black Workman CX-3-PL-PL Coax Jumper