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<ul><li>300db Train Horn for Truck: Our electric train horn uses the internal reflux design, with a maximum volume of up to 300dB. Our train horn for trucks gives out loud voices to remind others when driving, which can avoid unnecessary harm and provide a certain guarantee for driving safety. Super Loud Electric Boat Horn: Our 12V air horn for the boat has an extremely powerful directly injected mini-compressor paired with a snail design to really charge and amp up the sound Super-Loud 120dB sound can not be ignored. Please do not use it near schools or hospitals. Long-Span Service Life: Our 12V loud car horn is made of ABS polymer material, the metal trumpet is weather-resistant and waterproof, and you don't have to worry about rusting and short-circuiting even in the rain. All kits are designed to serve for a long time. Easy To Install: With no complicated steps, the operation of a 12V loud car horn is super simple and easy to install. Our motorcycle horn is suitable for almost any vehicle and watercraft, like truck, train, pickup, motorcycle, Jeep, SUV, boat, yacht, and so on. Lightweight Loud Train Horn for Trucks: Our 12v loud car horns don't have bulky air compressors, only small devices that produce incredible sounds Combined with a snail reflux design, the loudness is up to 120dB. And very light, easy to handle and install.Specifications Material: ABS Colour: Black &amp; Red Sound Level: 110 + 5 dB Voltage: 12V Frequency: Low 410Hz &amp; high 510HzPackage Includes 2 x Horns 2 x Brackets and Screws 1 x Controller Relay (Black horns haven't relay, just the blue horns have relay)Operation Guide The electronic system controls the horn to transform the soundfrequency: Low 410Hz &amp; high 510Hz Repeat the above step to transform the sound continually. One sound will be kept until you press the button.Wiring method The red line is connected to the 12V positive pole. The black wire is connected to the negative pole of 12V voltage. The blue wire is connected to the horn controller</li></ul>

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300db super loud waterproof 12V roaring speaker, compatible with cars, motorcycles, trucks, ships

300db Train Horn for Truck: Our electric train horn uses the internal reflux design, with a maximum volume of up to 300dB. Our train horn for trucks gives out loud voices to remind others when driving, which can avoid unnecessary harm and provide a certain guarantee for driving safety. Super Loud Electric Boat Horn: Our 12V air horn for the boat has an extremely powerful directly injected mini-compressor paired with a snail design to really charge and amp up the sound Super-Loud 120dB sound can not be ignored. Please do not use it near schools or hospitals. Long-Span Service Life: Our 12V loud car horn is made of ABS polymer material, the metal trumpet is weather-resistant and waterproof, and you don't have to worry about rusting and short-circuiting even in the rain. All kits are designed to serve for a long time. Easy To Install: With no complicated steps, the operation of a 12V loud car horn is super simple and easy to install. Our motorcycle horn is suitable for almost any vehicle and watercraft, like truck, train, pickup, motorcycle, Jeep, SUV, boat, yacht, and so on. Lightweight Loud Train Horn for Trucks: Our 12v loud car horns don't have bulky air compressors, only small devices that produce incredible sounds Combined with a snail reflux design, the loudness is up to 120dB. And very light, easy to handle and install.Specifications Material: ABS Colour: Black & Red Sound Level: 110 + 5 dB Voltage: 12V Frequency: Low 410Hz & high 510HzPackage Includes 2 x Horns 2 x Brackets and Screws 1 x Controller Relay (Black horns haven't relay, just the blue horns have relay)Operation Guide The electronic system controls the horn to transform the soundfrequency: Low 410Hz & high 510Hz Repeat the above step to transform the sound continually. One sound will be kept until you press the button.Wiring method The red line is connected to the 12V positive pole. The black wire is connected to the negative pole of 12V voltage. The blue wire is connected to the horn controller