... ; LED; PC 20/24 Pin ; POWER SUPPLY TESTERProduct IntroductionThe power supply tester is a robust voltage, tester for PC-power supply ATX, BTX and ... of operation Turn-on your power supply ;Plug-in your 24 pin power supply connector to mini tester;Check LED light if ... , Plug SATA con…, check +12V, +5V,+3.3V;SpecificationVoltage source: 20/24 pin (ATX-connector)Voltage test: +12V,-12V,+5V-5V,+3.3V,5V ...