Feature:1. Universal: Compatible with all cars and devices with 12V DC power supply. High 40A coil capacity, able to handle those high current applications with ease.2. Important Parameters: Wire harness rated current 40A, rated voltage 12V, 24V, coil power 12V, coil power 1.8W, contact load 35MA.3. Premium Material: The relay uses pure copper coil contacts with good electrical conductivity and a mechanical life of more than 10,000 cycles.4. Durable Housing: Quality composite housing, safe and flame retardant, protects against harsh temperatures and harsh conditions under the hood.5. Easy Wiring: The relay socket has loads/accessories of different colors, and wiring is simple and convenient. Easy to install, no need to change cables, plug and play.Specification:Item Type: 12V Horn Wiring Harness Relay KitMaterial: ABS, CopperContact Load: 35MAContact Switching Voltage: 12VContact Form: ConversionRated Current: 40ARated voltage 12V, 24VCoil Power Supply: 12VCoil Power: 1.8WApplication: Automobile.Package List:1 x 12V Horn Wiring Harness Relay KitNote:If the horn works unstable:a: Whether the copper terminals are loose or fall off?b: Is the battery power sufficient?c: Is the horn cable too thin?d: Whether the horn button is damaged?