12V portable charger jumper cable, built-in 200A fuse protection. Replacement jump box cables, fit most brands of mini portable jump boxes, mobile chargers How to use the car jump starter: 1. Connect the red battery clamp of the jumper cable to the vehicle's positive (+) battery and connect the black one to the negative (-) pole; 2. Plug the EC5 clamp into the jumper socket; 3. Start the vehicle. Solid alligator clip with full copper cable, ensure the high quality and safety protection. Precautions: Do not reverse the operation sequence of the jump starter; Do not use the jump starter to start the vehicle if the number of battery indicators is less than 3 to protect the jump starter from damage; Remove the product from the vehicle within 30 seconds of starting the vehicle, otherwise it may cause safety incidents.