SpeedTech Lights Mega 100-Watt Police Siren and Emergency Vehicle Siren System with Horn and PA Microphone LOUD & POWERFUL - 100-watt siren system output MULTIPLE SIREN TONES - Wail, Yelp, Sting, Tool, Hi-Lo MANUAL SIREN & HORN - Manual toggle for siren and horn DURABLE MICROPHONE - Microphone and clip mount included LED INDICATOR - Buttons LED light up when powered on