... in china PS-303 AC to DC Switching Power Supplyhigh stability, high effeciency,dual indication, for ... shorting protection PS-303D+ AC to DC Switching Power Supplyhigh stability, high effeciency,dual indication, for ... a half current, press down the button.Power supply inputThere is a button at the back ... : All designs have DC 5V Preset Output Function,D+ is LED Display ,DM+ is milliammeter digital display ...