ITEM NAME:12V 110db Car Truck Lorry Boat Snail Compact Dual Tone Siren Loud Air SGX.A set of snail super loud 12V steam horn. Sound about: 420HZ bass / 500HZ treble. The blue wire is connected to the horn switch wire (that is, a switch is connected above the blue wire, and the other end of the switch can be connected to the positive pole or the negative pole).
