... protection 3.Warranty:2 years usa plug ac-230v power supply 12v 1 amp : Input Voltage100~240VOutput Voltage3~24VOutput Current2A maxPower18W ... short-circuit, no open circuit, no bad led indicator ,no high voltage, no low voltage, no output, etc Assembly full inspection ... full inspection: to make sure every unit with power, no high voltage, no low voltage, no bad led indicator, low ripple ...