The Apex 100 Watt Siren from SpeedTech Lights is a built in emergency vehicle siren system and vehicle controller with 6 independent switches (10 amp ratings) for hooking up and powering your emergency vehicle lighting products along with being a siren control system. This siren system also comes with a programmable manual mode and radio rebroadcast feature both programmed and operated independently. The 6 switches to power on lights come equipped with an LED indicators which activate when each switch is powered on so you know what products are in use from inside the vehicle. Simply wire all your products to the separate amplifier, and you have full vehicle control from you Apex Siren faceplate. We definitely took power into consideration when building the Apex emergency vehicle siren by incorporating a powerful 100-watt siren output for the horn and siren functions. You can be more than confident that traffic will hear you coming from a distance with this powerful siren system in your vehicle.