FARBIN Car Horns Kit with Button 12V Truck Horn Loud Train Horn for Car Electric Air Horns (Black Snail horn with harness and button, 12v) 12V Black horn with wire harness and button is up for auction in Automotive. The current bid is $3.50, 88% below the $29.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.