banhao alarm horn siren pa speaker mic system,banhao 100w 12v 7 sound loud car alarm police car siren speaker system emergency amplifier alarm kit horn for 12v truck lorry boat siren horn is up for auction in Automotive. The current bid is $2.00, 92% below the $25.95 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.