The adapter box is constructed from durable ABS plastic material, ensuring long-lasting durability. The adapter component is meticulously crafted from pure copper, significantly enhancing conductivity and safety. Externally wrapped in flame-retardant materials for added protection. Dual grips are ingeniously designed to optimize conductivity and tension. [Easy to Use]: Step 1: Connect red clamp to positive pole and black clamp to negative pole (-). Step 2: Insert battery into battery adapter to use it. Step 3: After the car starts normally, be sure to remove clamp clip within 28 seconds. Please read all the instructions carefully and follow the steps. [Important Tips]: Strictly follow the operational sequence of the emergency starter. Ensure your battery is fully charged before jump starting. Follow the correct connection to avoid potential damage or safety risks. Disconnect the cables promptly after the car starts to prevent overheating. If the car doesn't start on the first try, please wait a few minutes and try again. High-concerned Chemical: None Model Number: Igniter Jump Starter for Milwaukee Accessory Type: Battery Accessories Fit for Milwaukee 18V Battery Color: As Shown Material: ABS Package Contents: 1 x Car Booster Cable