This power supply converts AC to DC, widely used in power adapter, LED strip light, LED display, billboard, industrial equipment, etc. Features: Switch power supply, convert AC 110V/220V to DC 12V. The voltage will be changed from 110V to 220V if the voltage is higher than 110V. Constant and precise output voltage. Short circuit protection, overload protection (105%-150%), over voltage protection (115%-135%). Widely used as power adapter for led strip light, LED display, billboard, industrial equipment, etc. IN-DOOR USE ONLY!