The UBL 100-Watt Rotary Siren is an excellent siren for any first responder. The compact size makes it easy to mount in any POV, fire truck, police car, and more. The UBL 100-Watt Rotary Siren is compact but loud enough to alert drivers and move traffic when you need to respond quickly. Featuring 6 tones with a selector dial, volume control, horn switch, and 2 switches to control your warning lights.