Tune - Tequila   

Trumpets - 4 x ABS Red Plastic (Largest 85mm x 270mm)
Brand - Stebel - Italian Design
Voltage - 12 volt Kit comes with trumpets, heavy duty compressor, relay, hose & mounting hardware.

Click on the Video Link to listen to the sound

Not included but required for installation - 20 amp cable, terminals, Fuse & holder, horn switch

DISCLAIMER: For on-road use please check with local authorities for regulations.
Reference: MP4 12 TQ