The battery clamp is made of high-quality copper material to ensure excellent conductivity and enhanced safety. After the automobile is started, the anti-back charging current is less than 1A, making the clamp safer and more reliable. When connecting the red clip to the black clip, there is no damage or spark upon power activation, providing short-circuit protection. The battery wire clip is constructed with premium ABS plastic, offering good insulation, resistance, and aging resistance. This test wire clamp is designed for emergency automobile starting and battery booster applications, ensuring strong practicality. The battery clamp is built with high-quality copper, an ABS plastic shell, and thickened silicone wire for durability. It delivers good electrical conductivity, water resistance, and wear resistance. The clamp maintains a stable 12V voltage output, enabling smooth power delivery to protect the car starter. Notice: - When the green light is on, do not create a short circuit or reverse connect to the car battery. - Remove the clamps within 30 seconds after the vehicle has started. - Do not connect or attach two clamps together, as this may cause danger. - Keep this device away from children. Note: - Installation guide not included. Please verify the item meets your requirements before use. - Product design may be updated across different batches; slight variations in appearance or color may occur but do not affect functionality. Color: Black Material: ABS Package Contents: 1 x Emergency Battery Jump Cable Clamps Note: Light reflection and display differences may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3 cm.