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 A1278, A1502, A1344, A1465, A1502, A1425, A1435, A1466, A1398, A1424, ME293, ME294, ME664, ME665, MC975, MC976, MD506, MJLU2, MJLT2, MGXC2, MGXA2. 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 withi