Feature:? The upgraded air compressor and larger coil can be made into stronger air pressure, which promotes louder and clearer sound from the horn.? Compatible with 12V system, can be used for SUV, motorcycle, yacht, ship, off-road vehicle, bus, train, etc.? High-quality chromium-plated zinc-aluminum alloy material, hard, durable, wear-resistant, corrosion-resistant, and has a long service life.? The double-tube horn is specially designed for customers looking for a loud and affordable air horn, with a sound level of 600dB, stable performance and higher work efficiency.? Easy to install: Our speaker kit is very easy to install, you only need to connect the wire on the straight screw terminal to the original speaker wire or the horn switch on the dashboard. It also comes with a universal mount to make installation easier.Specification:-- Color: silver-- Material: high quality chrome plated-- Sound level: 600DB-- Voltage: 12V-- Designed for any 12 volt DC: suitable for cars, boats, trains, trucks, engineering vehicles, etc.Packing Included:1 double horn electric horn1 set of installation hardware