Detailed Product Description 3 trumpet 130 db Loud Train Air,Auto Parts(JGT-311-1)BIG AIR HORN , SOUND VERY LOUD , GOOD QUALITY , HEAVY IN WEIGHT Speciation: Air pressure: 0.4 --0.8mpa Current: <= 3.5A (12V); <= 7.0A (24V) Rated voltage: 12V / 24V Trumpet size: 309MM,365MM,420MMDiameter of horn mouth: 160mm Packaging details: a canton box, if you would like we could make your brand color box if ...