The PC computer ATX / BTX / ITX + HDD + SATA power supply tester can supply you the tools to make sure that your power supply is fully operational and ready to work. It digitally tests the connectivity and power voltage coming out from various vital PC power connectors. This tester if a useful tool for you to test the power supply of your PC. - Digitally tests the connectivity and power voltage coming out from various vital PC power connectors - Tests ATX power supply connector from PSU regular HDD/DVD power connector and SATA power connectors - Displays results via the on-unit LED panel (labeled in English) - Full support list: ATX 24P/20P/8P/6P/4P/Floppy/SATA/HDD - English user's guide included