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. Specification - 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's positive (+) battery terminal and connect the black clamp to the negative terminal - Plug the cord of jumper cable into the jump starter's socket - Start the vehicle Cautions - 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 device from damage - Remove the product from the vehicle within 30 seconds after the engine starts to avoid potential safety issues Packing list 1 x EC5 connector emergency jumper cable alligator clamp booster battery clip for universal car jump starter