Air Horn,Car Horn,Truck Horn,Auto Horn,Auto Parts(JGY-108-2): 1.two trumpets 2.with the electric valve(JGK-503-2) 3.chrome Air Horn,Car Horn,Truck Horn,Auto Horn,Auto Parts(JGY-108-2):two trumpets with the electric valve(JGK-503-2),it is chrome,12v or 24v