p>DIGIFLEX ATX Power Supply Tester 20 24 Pin SATA LCD Diagnostic PSUA Excellent tool for testing 20/24 pin ATX computer power supplies for proper voltage output. Regularly testing your power supply to catch problems before they damage your computer is ideal for preventing electrical mishaps. Our handy little tool can quickly test your PC power supply.Compatible with ATX / BTX / ITX Computer Power Supply Features: Complies with ATX, BTX and ITX standards Easy to read digital LCD display LCD indicates voltage status SPS / PC Suitable for audiophiles as well as quick function checks in professional environments Voltage Source: 20 / 24 pin (ATX - Connector)Voltage Test: +12v, -12v, +5v, -5v, +3.3v, 5v Standby (SB) 12 v Power Good (PG)Connectors: Floppy, HDD, CD ROM, SATA, 4-pin (P4), 8-pin (Dual-CPU), 6-pin (PCI-Express)How to use: Plug the power supply 24PIN and P4, P6 or P8 into the corresponding jacks of the power supply test kit. Turn on the device power, the device will make a "DuDu" sound if no lights flash, then the power supply output voltage is normal. If a certain voltage signal is not detected, or the detected voltage value exceeds the normal level, the device will emit a long beep; if the corresponding voltage or PG also flashes, the power supply is faulty.Size: 12 x 6.2 cm (L x W)Package includes: 1 x Power Supply Tester