One High Tone / One Low Tone Electric Horns, 12V @ 5amps each horn, Min db rating @4″: 130db, Frequency High Tone 485Hz, Frequency Low Tone: 405Hz, Rugged Construction, Steel housing and plastic projector, Cooper wire coil motor, corrosion resistant finish, made in the USA, Includes universal mounting brackets, 9-1/4″lx6-5/8’Wx3-1/2″D, two terminals, not available in 24 volt