Sculpted features and muted graphics give the 19DXIV a dynamic look that will compliment any of today's vehicles. Its compact design allows for easy installation into most cars and trucks and illuminated LCD display allows for high visibility of display. The RF gain adjusts receiver sensitivity to match incoming signals and allows you to decrease sensitivity for strong signals and increase sensitivity for weak ones. Electronic tuning precisely tunes all 40 CB channels and instant channel 9/19 allows for instant access from any channel to Emergency Channel 9 or Information Channel 19. Combination S/RF meter indicates incoming signal strength and output RF power output. The CB/PA switch selects CB operation or public address (PA) operation for communication outside of the vehicle with PA horn (not supplied). The 4-Pin screw-on mic connector allows for the convenient removal of the mic for storage and easy reach from anywhere inside the vehicle. The heavy-duty dynamic microphone with 9-foot cord is contoured with dynamic voice response circuitry.