Wolo (365) The Enforcer Siren and Air Horn - 3 Emergency Sirens, 1 Truck Air Horn Sound Allows for one touch of the keyboard to sound your choice of three different emergency sirens or a powerful truck air horn sound Used to attract immediate attention with its powerful 20 watts of sound Kit comes complete with mounting hardware Police Wailer siren, Fire Truck High-Low, siren Ambulance Euro siren