Dual input voltage: AC 110V/220V. Output: DC 5V 5A max, Output voltage is adjustable ±15%. IN-DOOR USE ONLY! Works with device that draws less than 5A, such as DC 5V 1A~4A. The max use of power should be no more than 80% of the full loads 4A 20W. Over Voltage Protection, Overload ProtectionOver Current Protection, Over Temperature Protection Short Circuit Protection High quality Widely used in Industrial automation, Electronic equipment, LED display, LED Lighting, LED Strip, CCTV cameras Security System, Computer Project, Home appliance etc. Over Voltage Protection, Overload ProtectionOver Current Protection, Over Temperature Protection Short Circuit Protection Why does the LED power supply stop working Maybe the overcurrent protective switch (in the power supply) disconnect. Please unplug your AC cable, it's important! Then wait about 10 minutes. It will be auto recovered. Then reconnected it, it will work well.