Specification: AC 100-240V (Worldwide use) Output: 19V /7.1A 135W Plug diameter outside / inside: 5.5mm / 1.7mm Compatible Devices: Fit for Acer AN515-55-53 AN515-55-53AG AN515-55-52KW AN515-55-56S8 AN515-55-52H0 AN515-55-77KS AN515-55-51ZY AN515-55-73AA AN515-55-76F5 AN515-55-54Q0 AN515-55-76EA AN515-55-57NA Compatible Devices P/N: Compatible with Acer PA-1131-05, ADP-135K ADP-135KB T PA-1131-16 / ADP-135KB T, KP.13501.004, KP.13501.005, KP.13503.006, PA-1131-05 Multiple Protection: Internal smart circuit keeps you and your device safe with multiple protections, including over current protection, over voltage protection, short circuit protection, over heating protection, overload protection, surge protection and under voltage protection Package - 1 X power cord.