Product parameters: -Material: Polyethylene -Packing list: 1*black+1*red cable Technical specifications: 3m 4mm² 12 AWG solar panel extension cable with connector and plug (3m red + 3m black). Minimize power loss in the solar panel system. Cable connectors on both sides: The cable contains a plug on one end for easy connection to the solar panel, and the other end contains a bare wire directly to the solar charge controller, easy to use and reusable. High quality: Made of high-purity oxygen-free copper, with tin-plated surface, strong carrying capacity and fast conduction. The connections and wires are waterproof and can be used normally even in harsh weather conditions to ensure the safety of power consumption. Insulating outer skin: With an insulating inner layer, it has excellent anti-aging effect, is not easy to heat up, and is resistant to extreme heat and cold. Good contact material ensures transmission under stable conditions while effectively extending the service life of the cable.