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. The red and black clips can be connected without damage or sparking upon power connection, providing short-circuit protection. 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 automobile starting and battery booster cable applications, ensuring strong practicality. Made with high-quality copper, an ABS plastic shell, and thickened silicone wire, this battery clamp delivers 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 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 out of reach of children. Note: - Installation guide not included. Please verify the item meets your requirements. - 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 differences in display screens may cause minor color variations between the product image and actual item. Measurement error allowance is +/- 1-3 cm.