Usage of Car Jump Starter: 1. Connect the red battery clamp of jumper cable to the vehicle's positive (+) battery and connect the black to the negative pole. 2. Plug the cord of the jumper cable into the jumper starter's socket. 3. Start the vehicle. Cautions: 1. Do not reverse the operation sequence of the jump starter. 2. Do not use jump starter to start the vehicle if the number of battery indicators is less than 3 to protect the jump starter from damage. 3. Do remove the product from the vehicle within 30 seconds after the vehicle starts, or it may cause security incidents. 4. Please be careful when using this product, this item can NOT be overloaded. Please check your device's power before using it. 5. Note: Please check your power bank if it can support your car.