The 40-Channel CB Radio by RoadKing is made from high-grade materials to meet the strictest standards of high quality. Designed to ensure superior reliability it provides long lasting trouble-free service. With full 4 watts AM RF power output (Maximum FCC Allowable) it has a front panel 4-pin mic connector and dynamic mic with 9 foot cord and RF gain control and PA capability. Hi-cut removes high frequencies to improve audio quality with SWR calibration of antenna system for maximum performance. Antenna warning indicator and receive-transmit indicator with automatic noise limiter reduces vehicle interference. SWR RF illuminated meter and large digital display and switchable ANL and noise blanker. Its classic design ensures that it looks great in any truck cab while its advanced features make it one of the best CB radios on the market. Its classic design and advanced features make it one of the best CB radios on the market providing reliable communication and exceptional sound quality even in noisy or challenging environments. Product Dimensions (TM)12.75 x 36 x 3.5 inches. The ultimate communication device for truckers.