Input: AC 100-240V,1.5A 50-60Hz Output: DC 20V-4.25A. Note: This is the second generation magnetic power adapter (T-type), not the first generation. The Mac book Pro charger is designed with an LED light that displays the charging status (red - charging, green - fully charged). Compatible models: Designed to match your Macbook Pro 17-inch, 15-inch and 13-inch laptops A1398, A1424, MC975, MD506, ME293, ME294, ME664, ME665, MGXA2, MGXC2 Built-in IC chip technology provides overload/short circuit protection/overload protection/overheat protection. We test each charger to ensure a tight, strong magnetic connection. Excellent After-Sales: We have always been committed to provide products of superior quality at unbeatable prices and believe that our products will bring you a pleasant experience.If for any reason you are not 100% satisfied with our 60W power adapter, please contact us, we will reply you within 24 hours. 1