About this item Universal Input: 100-240V AC; Output: 12V DC 33A Widely used in Industrial automation, LED display, CCTV, Radio, Computer Project, LED Strip Lights, 3D Printer LED Light/Strip/Plate Outdoor Advertising Box, Outdoor Lighting Project...... Circuit Short Protection, Overload Protection and Over Voltage Protection Ensures the Safety of Using This Power Supply Metal Enclosed Body is good for Heat Dissipation which Can Prolong the Lifespan of the Power Supply Dual input voltage: AC 110V/220V. There is a switch, choose the proper voltage before use. Please set the switch to 110V for USA.