Universal Input: 100-240V AC; Output: 24V DC 16.5 A 400W. Suggestion: The power used should not exceed 80% of the power of the 24v power supply 24 volt power supply widely used in Industrial automation, LED display, CCTV, radio, computer project, LED strip lights, 3D printer and other 24v dc products 24v dc transformer protection: short-circuit protection, overload protection, over-voltage protection, cver-current protection, overheat protection, leakage protection and under cooling protection Metal enclosed body is good for heat dissipation which can prolong the lifespan of the 24v dc 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