Usage of Car Jump Starter: Connect the red battery clamp of jumper cable to the vehicle's positive (+) battery and connect the black to the negative pole. Plug the cord of jumper cable into the jumper starter's socket. Start the vehicle. Features: This booster cable with clamps is a strong alligator clamp clip with EC5 Plug connector. Designed with prevent reverse charge module, it is very safe and convenient. It works with car jump starter, and fits for most car jump portable starters. Specifications: Material: Metal, Plastic Color: As Picture Shown Rated Voltage: 30V Rated Current: 160A Reverse Voltage: 30V(the voltage is less than 20V when the car is starting or the clamps are connected) Wire: 10 AWG Silicone Wire Plug: EC5 Plastic Shell Package Includes: 1PC *Booster Cable.