Wolo Model  415 Airsplitter Chrome Metal Dual Trumpet Air Horn Kit - 12 Volt
The AIRSPLITTER is Air Powered and is Super Loud! Dual metal chrome plated trumpets with heavy duty compressor, 12 volt. Easily installed in all vehicles and is maintenance free. Kit includes relay, hose and mounting hardware. 120 Decibels – 540/660 Hz – Middle Range. Longest Trumpet is 9-1/4 in.