Specification: Name: Automobile single-tube air pump air horn Voltage: 12V Sound level: 108-118 (db) Speaker size: 450*100*95mm Air pump size: 110.2*49.2mm Sensitivity: strong Frequency response: high Color: golden (horn) + red (air pump) Applicable models: Universal Working pressure: 0.3-0.9MPa Temperature adaptation range: -40-80 C. Service life: up to 100,000 times or more Packing included: 1 * Air pump 1 * Air horn 1 * set of Accessories 1 * Harness Features: - Made of metal, to ensure maximum strength and durability for long lasting usage. - With a polished red air pump and shiny chrome horn they cast a striking appearance on any vehicle mounted. - Designed for customers looking for a loud and affordable air horn. - This train horn can fit in most vehicle, but deliver the big sound you need. - Easy to install. The horn kit includes basic mounting hardware and hose. Note: 1. The operating current of the control relay must be greater than 10A. 2. The main power line cross section of the relay is greater than or equal to 2.5mm2, the output line is not less than 1.5mm2, and the negative line should be in good contact to ensure the use of this product. 3. The horn air source should be directly introduced from the air reservoir to achieve better sound quality; the air reservoir must discharge water frequently to avoid affecting the service life of the solenoid valve.