Super Horns For Train Trucks Car Motorcycle Boat Snail Air Horn Compressor Description Power supply voltage: 12(V) Sound level: 1105(db) Color:Black/Black and Red Packadge Include:1pcs * Horns FEATURE Discrete, Compact DesignComplete Water and Weather Resistance The Most Powerful on The MarketLoud, Clear and Deep Train-Like Sound Simple Installation, Manual included with every purchase Loud double tone: Internal recirculation design, warn you loudly about others, and provide a certain level of safety for driving. Note The size may have an error of 1-2cm. If you want to have different color, you can leave a note when you placed the order Due to different personal measurement methods, there will be an error of 2-4 cm, please understand Thanks for your support