Buyer's Guide Compact and versatile, this train horn measures 3.75 x 3.45 x 2.56 inches. Each horn operates at 4A current, with a combined total of 8A for the pair. Compatible with a 510A fuse and designed for 12V power supply vehicles, it fits a wide range of applications including cars, trucks, SUVs, motorcycles, and boats. Select based on your specific vehicle requirements for performance. Powerful Sound Performance Engineered with and low tone resonance, this air horn delivers a clear, commanding sound level of 105115dB. The stable frequency and strong sound projection help alert pedestrians and other drivers, reducing the risk of traffic accidents. Ideal for warning surrounding vehicles in busy urban areas, signaling when overtaking, or gaining immediate attention when driving in lowvisibility conditions. Construction Quality Built with a onepiece design for enhanced impact resistance, the horn structure protects the internal electronic components against damage. A refined screw cap design provides an improved visual finish, eliminating the appearance of excess adhesive and maintaining a professional look. LongLasting and Durable Materials Made of quality ABS plastic, the horn is both waterproof and wearresistant, ensuring reliable performance in all weather conditions. Metal nuts and gaskets resist rust for extended service life. Tungsten contacts in the gasket offer electrical conductivity, ensuring consistent power delivery and dependable operation. Practical Applications • Ideal for trucks or SUVs that require extra sound power for highway driving. • for motorcycles or boats where compact size with strong output is essential. • Suitable for cars in traffic zones needing clear and reliable alert capability.