Description: *Discrete, Compact Black Design *300DB Sound Volume, The Most Powerful on The Market!Low power consumption and high performance. *Loud, Clear and Deep Train-Like Sound,Reduce unnecessary injuries and add a level of safety to your driving. *Made from Quality metals and an ABS construction that wont oxidize,Low power consumption and high performance. *The beautiful snail angle appearance adopts special waterproof and dustproof design,Complete Water and Weather Resistance *Simple InstallationUniversally used in most motorcycles, ATVs, go-karts, trucks and 12V power supplies. Specifications: Material: ABS Loudness coefficient: 500DB Technical support: Vehicle power: 12V E mark rating: LOW 410HZ HIGH 510HZ Single speaker size: diameter: approx.9 cm ; depth: approx.9 cm Quantity: 2 pcs Package Included: 1 Pair Snail Air Horn（With accessories）