Usage Tips: This replacement jumper cable is compatible with most brands of portable jump starter for 12V vehicles with EC5 connector. It provides protection for overcurrent, overvoltage, overtemperature, undervoltage, reverse charging, reverse polarity and short circuit. Specication - Color: As shown. - Material: PUV insulating material and copper wire. - Size: 30x6x1.5cm / 11.8x2.4x0.6inch. - Input voltage: 12V. - Starting current: 300A. - Strong Alligator Clamp Clip with EC5 Plug Connector (Fit for most car jump portable starters). Usage of Car Jump Starter - Connect the red battery clamp of jumper cable to the vehicle#39;s positive (+) battery and connect the black to the negative pole. - Plug the cord of jumper cable into the jumper starter#39;s socket. - Start the vehicle. Cautions - Do not reverse the operation sequence of the jump starter. - Do not use jump starter to start vehicle if the number of battery indicators are less than 3 to protect the jump starter from damage. - Do remove the product from the vehicle within 30 seconds after the vehicle started, or it may cause security incidents.Packing list1 x EC5 Connector Emergency Jumper Cable Alligator Clamp Booster Battery Clips for Universal Car Jump Starter