SpeedTech Lights Vireo 100-Watt Handheld Police Siren and Emergency Vehicle Siren System with Horn and Handheld PA Microphone HANDHELD CONTROLLER - Control everything from your handheld controller LOUD & POWERFUL - 100-watt siren system output with compact design MULTIPLE SIREN TONES - Wail, Yelp, Sting, Tool, Hi-Lo & Horn ADDITIONAL A/B/C/D BUTTONS - Connect warning lights to these buttons for full vehicle control LED INDICATOR - Buttons LED light up when powered on