SpeedTech Lights Boss 200-Watt Police Siren and Emergency Vehicle Siren System with Horn and PA Microphone LOUD & POWERFUL - 200-watt siren system output MULTIPLE SIREN TONES - Wail, Yelp, Sting, Tool, Hi-Lo DUAL TONE SIREN - Have 2 sirens going together with secondary siren selector DUAL TONE MANUAL MODE - Control 2 manual mode toggles on separate speakers at once VOLUME CONTROL - Control the volume of your siren and microphone