Shh-003 is air musical horn used for bus, truck, and all other heavy vehicles, horn switch and packing box is included Item detail : Model number : shh - 002 Rated voltage: 12-24v Sounds : 5 Running current: ≤4 Frequency: 1800-3550 Sound level: 105 ≤118 Length: 450 Material: plastic, steel, brass, Usage: trucks, bus, heavy vehicles Moq:500pcs Production time:30 days Payment:30% deposit, 70% t/t before shipment Packing: 10pcs box, colour box