Please note:<br> Horn is suitable for all cars without air supply system<br> There are 4models to choose from (the fifth is a compressor, not a complete set of air horns, which is suitable for repair and replacement).<br> IF your car is 1<br> 2V ,please choose 12V air horn---IF your car is 24V ,please choose 24V air horn<br> It can produce sound as loud as 150DB. The great powerful sound catches everyones attention<br> Specification:<br> Material: Zinc alloy<br> Voltage: 12V or 24V<br> Product size : 45 cm x 10 cm x 9 cm / 17.7 *3.9 *3.6 inches<br> Hose inner diameter :0.7cm<br> Package includes:<br> 1x Single Trumpet Air Horn<br> 1x Air Compressor<br> 1x Air Hose<br> 1x Bag of Fixings<br> 1x instruction manual<br> 1x Relay harness<br> p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; line-height: 19.0px; font: 13.0px Helvetica Neue; color:<br> 000000}<br> p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; line-height: 19.0px; font: 13.0px Helvetica Neue; color:<br> 000000; min-height: 15.0px}