The PA 100 Watt Public Address System is your standard dual functionality horn control system paired with a public address microphone system built into one unit. This unit provides a clear sound frequency so that you can address the public clearly through your vehicle. SpeedTech Lights designed this PA 100-watt system to put out an intense 100-watt output horn with a different tone for Horn A and Horn B. By clicking on our flash player located above you will actually be able to hear the tones of each horn. With a durable microphone including and the entire amplifier and faceplate built in together, the installation of this PA 100-watt horn system in simple and can be wired to any of STL's 100-watt speakers.