Dual input voltage: AC 110V/220V. Output: DC 5V 20A max, Output voltage is adjustable ±15%. IN-DOOR USE ONLY! Two sets of output Channel. With two independent output channels, it can power more devices. The maximum output of each channel can reach 20A 100W. Total output power of the two channels is 20A 100W. Works with device that draws less than 20A, such as DC 5V 1A~15A. The max use of power should be no more than 80% of the full loads 20A 100W. 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 u