Model 879 Quadraphonic Express™ Lanyard Valve Controlled 153 Decibels 307/307/347/440 Hz

When a vehicle owner demands the powerful sound of a truck train horn, go no further, QUADRAPHONIC EXPRESS is the horn to choose. The four (4) metal trumpets produce a ULTRA powerful train horn sound that will be heard! QUADRAPHONIC has a heavy-duty mounting base which is constructed of solid steel to help prevent vibration. The horn is a bright triple chrome finish which means you will have a horn that looks as good as it sounds. Comes with a heavy-duty lanyard valve, mounting hardware and 10 feet of 1/4 inch O.D. nylon high-pressure hose.

QUADRAPHONIC EXPRESS requires an on-board air system, (recommended Wolo on-board air system are Models: (858 or 860).