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 protection against short circuits. The battery wire clip is constructed from premium ABS plastic, offering good insulation, resistance, and aging resistance. This test wire clamp is designed for emergency vehicle starting and battery booster applications, ensuring strong practicality. The battery clamp features a high-quality copper core, ABS plastic housing, and thickened silicone wire, delivering superior electrical conductivity, water resistance, and wear resistance. It maintains a stable 12V voltage output, enabling smooth power delivery to protect the car starter. Notice: When the green light is illuminated, do not create a short circuit or connect in reverse to the car battery. Cautions: Remove the clamps within 30 seconds after the vehicle has started. Do not connect or attach both 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 and do not affect functionality. Color: Black Material: ABS Package Contents: 1 x Emergency Battery Jump Cable Clamps Only the items listed above are included; other products are not part of this package. Note: Lighting reflections and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3cm.