Compatible Model: Electric fuel pump relay kit for 12V systems with continuous current below 40 amps. Function: Prevent the fuel pump voltage drop, keep the fuel pump pressure constant, and prevent the fuel pump current overload damage to the vehicle electrical system. Easy installation: All wires are clearly labeled and color-coded for easy differentiation. You can follow the installation drawings or search related videos to install. Water resistance: 40 amp heavy duty waterproof relay and in-line waterproof fuse box. Made of high quality material and durable. After-sales service: If the product has any quality problems, please contact us, we provide a one-year warranty policy.