The Orient Express has been designed smaller in size for the vehicle owner that wants a powerful train horn sound. Made to fit into an engine compartment that has less available space. The four (4) trumpets are brass triple chrome plated to have a bright finish. Built into the base of the trumpet is a 12 volt electric solenoid valve which is chrome plated. Comes complete with a high-pressure on-board tank system consisting of a heavy duty compressor and a 5.5 liter extended air storage tank. The Orient Express Plus will provide any driver the comfort of knowing that they will be heard!