... CE approved; LED; PC 20/24 Pin ; POWER SUPPLY TESTERProduct IntroductionThe power supply tester is a robust voltage, tester for PC-power supply ATX, BTX and ITX compliant, power ... The methods of operation Turn-on your power supply ;Plug-in your 24 pin power supply connector to mini tester;Check LED ... test: +12V,-12V,+5V-5V,+3.3V,5V Stand by(SB) 12V, power Good (PG)Connectors: Floppy, HDD, CDROM, SATA, ...