Fits for Car Truck Train SUV VAN Boat Motorcycle. Dual/2-trumpet air train horn with glistening black finishing. 150 decibels sound, super loud. Small size but powerful volume and tuned train horn sound. Easy to installation only need to simply mounted on your air compressor. Great sound quality, extremely stable frequency. Long service life, reliable working performance.
Professional installation is highly recommended if you have any difficult in installation Thepositive and negative poles of the power supply are respectivelyconnected with the two wires on the solenoid valve(no positive ornegative points) The air tap on the solenoid valve is connected to the gas source of the vehicle(make sure no air leak)
