Input: AC100-240V, 50/60Hz (worldwide use); Output: 12V 3.6A 48W. Compatible Models: Microsoft Surface Pro 1 Pro 2 RT 1512 1536 1601. It is not available for Surface Book, Pro3, Pro4, etc., and other models. Reliable circuit board design: overcurrent, overvoltage, overload, temperature and short circuit protection. Core security components, multiple protection and safer.