1、Copper Clamp: Sturdy battery clips are made of copper for durability, conductivity and a firm grip. Red represents positive, black represents negative. Copper terminal has high stability, oxidation resistance, electrical conductivity. 2、Universal: Suitable for most vehicles, the battery clips connect directly to the car battery and high power electrical appliances to protect the car cigar lighter. 3、Tin Plated Copper Terminal: Stable and erosion resistant tin plated copper terminal for supplying power to DC12V and DC24V appliances, ideal for emergency situations. 4、Portable for Emergency: The travel trailer uses sturdy metal crocodile clips, which can be placed on the trailer at any time to solve emergencies on the road. 5、Parameters: You will receive 2 battery jumper cables, the length of the harness is 1.2m, the maximum current is 30A, easy to wiring and use.