1Applicable Models: dual air trumpet is widely applicable to trucks, club cars, yachts, mine carts and much more to meet your needs with louder sound. 2Mounting Precaution: Pay attention to that the compressor must be mounted in a vertical position, far away from hot engine parts. Install horns slightly inclined downwards. 3Wiring Instructions: Connect the compressor positive to the electric system positive, and the negative to the negative, please wiring as indicated, and the connections should be short for minimum dropping of voltage. 4130dB Super Loud: The dual trumpet horn is professionally engineered for 130dB loud, which can greatly catch others attention for maximum safe driving experience. 5Complete Kit: The dual air horn is supplied with necessary accessories required for installation, delivering a simple operation process, fast and convenient.