PC78LTX CB RadioThe Uniden PC78LTX has set the standard for professional driver CB communications. Its compact design can fit perfectly in the overhead console of a truck or on the dash of any vehicle.Key notable features include an integrated SWR antenna calibration system that allows users to calibrate the vehicle&';s antenna system for optimum receive and transmit performance. This CB radio also includes an antenna warning LED, RF gain, microphone gain, hi-cut noise reduction, an automatic noise limiter, a noise blanker, and a PA system. This CB radio continues to be the number one choice of professional drivers and truckers.Integrated SWR Antenna CalibrationKeep the CB station performing at its best by using the CB&';s built-in SWR meter to precisely tune the antenna for the best signal.40-Channel OperationEnjoy the complete range of 40 CB radio channels to communicate with those around the user.High-Cut AudioCuts out the high-frequency interference for clear receive.RF Gain & Mic GainAdjusts receiver sensitivity for better reception and microphone sensitivity for 100% modulation.Automatic Noise LimiterAutomatic Noise Limiter and Noise Blanker reduce external noise and ignition interference.Features: RF gain Mic gain Bright/dim switch RX/TX indicator High cut on/off Instant Channel 9 S/RF/SWR calibration In the Box: PC78LTX CB Radio Microphone DC power cord Mounting bracket Mounting hardware Owner&';s Manual (pdf)