Features:Switch power supply, convert AC 110V/220V to DC 12V .Dual input voltage: AC 110V/220V. There is a switch, choose the proper voltage before use.Steady and precise output voltage.Short circuit protection, overload protection(105%~150%), over voltage protection(115%~135%).Widely used as the power adapter for Led strip, LED display, billboard, industrial equipment, etc. IN-DOOR USE ONLY!