FEATURES An inexpensive supplement to your car horn sound level with a legal* air horn tone. Delivers 100 watts of power to a 100-watt siren speaker. Can be wired remotely to the horn ring of the vehicle. The same familiar airhorn sound used by Police, Fire & EMS. Sturdy amplifier housing mounts in the trunk, under the seat or other remote locations. Features a high gain microphone and public address capability with adjustment for PA volume. May be used with standard 100-watt siren speakers such as Whelen SA314P.*in most states Shown with optional 15 foot extension cable sold separately