12V - Works with standard 12V D.C. electrical systems.
12V Vintage Loud Sound Trumpet Klaxon Horn Kit For Camper Car Van & Truck Black
Netagon 12v Vintage Loud Sound Trumpet Klaxon Horn for Car Van Truck Motorcyle Bike Camper Pickups (Chrome)
2 Pcs 115DB Super Loud Train Horn, 12V of Loud Snail Air Horn, Waterproof Double Horn Raging, Dual Tone Universal for Motorcycle Truck Train Boat Car Air Electric Snail Single Horn, Black-Red
Stebel Nautilus Compact 12V Electropneumatic Loud Car Van Horn Red
YUCHENSHLP 12V New Loud Snail Air Horn Set Dual Tone for Car Bike Van Boat Siren Twin Lorry(Red)
2X Red 12V 139dB Car Van Grille Horn Compact Super Tone Loud Blast 115Db UK
