The original Apple laptop charger is not equipped with a grounding pin, plus the Apple laptop is a metal body, charging is easy to bring static electricity, the use of extension cables can effectively solve the problem of static electricity. The Apple charger extension cable provides an additional 1.8m of length, making it more convenient to use your computer during charging. Standard Australian triangle plug, firm and not loose, save space in the plug and row. High quality copper core, fast and no heat. Note: Only power extension cable is provided, Macbook AC adapter is not included! If your product is defective within one year from the date of purchase, we will replace it for free. We offer technical support for customers with any questions or concerns.