Roadking RK5640 40 Channel CB Radio with USB Port

C4 the perfect match crystal clear communication. Front panel 2.1 Amp usb port to use and charge your portable devices. Noise-canceling classic rk56 cb microphone with chrome grill. Backlit control knobs with two settings. Swr calibration is set to the perfect match. Rf gain reduce sensitivity to distant noise and signals that are too weak. Squelch control eliminates background noise. Front panel 4-pin cb microphone connector. Antenna warning indicator alerts of a problem with the antenna system. Dimensions: 12 x 12 x 3 inches.