This is a snail horn, which has beautiful appearance with special waterproof and dust-proof. So that you can use it even in the extreme day. With 139DB loudness, it can give out loud and clear sound. Such a beautiful looking and practical product, you will like it.Features:139DB loudness, loud and clear sound.No air tubes needed, no external air supply needed.Comes with fixing bracket waterproof cover, made of pig iron and plastic, durable in using.Powered by 12V DC, low power consumption and high performance.Snail horn, beautiful appearance with special waterproof and dust-proof design.Easy to install, no installation instructions required.It requires only one fixing point.Fit for car, vehicle, motorcycle, yacht, boat, SUV, bike, buses, pick-up sea vessels ect.Specification:Condition: 100% brand newMaterial: Pig iron + plasticColor: BlackSize: Shown as pictureVoltage:12VMain Color: Black and RedAbsorption (at 24V): <=18 A(9 A)Fundamental Frequency: 530/680 Hz 5%Sound Pressure Level at 2m: >= 115 dB(A)Sound Pressure Level at 4in: >=139 dB(A)Reliability: 100.000 on / off cycleType of Sound: Harmonized twin tonePackage Weight: Approx. 722g / 25.5ozFitment: Universal fit for most Scooters/Mopeds, ATVs, Go-Karts, Dirt Bikes, Pocket Bikes and Motorcycles on the market.Package Included:1 x Snail Horn1 x Switch1 x Set of Bolt and NutInstallation Note:Connected directly to the battery relay.If you have not connected the horn relay, may cause electrical problem.It is recommended to use 20A-30A fuse.Mounting angle downward,so that moisture can not collect in the horn.If no sound or strange sound,check the horn -wire (+/-).Connect the grounding cable to avoid spark.Disconnect the ground cable first remove.Be careful not to put too close to the chassis of the horn-trumpe trattling noise reduction.Note:1. Minor modification may be required for mounting.2. The power of sound needs more than 80W.2. Please check the size carefully before you purchase.3. Please allow 1-3cm error due to manual measurement. Thanks for your understanding.4. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering..