If you want to attract immediate attention, this is the horn to get! It has 69 different sounds to choose from including 10 sirens. Plus, use the microphone to convert the horn into a powerful P.A. system. Features a volume control to allow the user to adjust to any level from soft to super loud. Easy to install in any 12-volt vehicle, no special tools required. Kit comes complete with control unit, plastic weatherproof speaker and a P.A. microphone.