Universal adapter before Mid 2012 for Mac book Pro 13" Inch | Input: AC 100-240V, 1.5a, 50-60Hz/output: 16.5V, 3.65a | Satisfaction GUARANTEED: Our product have CE/FCC/RoHS /UL certified, We will provide once Year Warranty and 24hours friendly customer service | Safety: advanced technology and certificated with UL/CE/FCC/RoHS /UL standard, can protect your equipment from over current, over voltage, over load, short-circuit | Note: This is the first generation of power adapter, not the second. Knowing which specific Mac notebook model you have is important. Please check clearly before buying. Satisfaction and backed by a lifetime replacement