Operation Instrcutions: Unroll the 's cable Clamp the red clip to the positive terminal of the vehicle's battery Clamp the black clip to the negative terminal of the vehicle's battery Specifications: Color: red Operation Voltage: 6-24V DC Cable Length: 16ft Overload conservation: 8A (When the current exceeds 8A, this item will disconnect the current automatically.) Package Size: 26.5 * 9 * 4cm Package Weight: 320g Package List: 1 * Circuit Tester