TRONWIRE 1.8-Inch Digital Readout LCD Display 20+4 Pin PC ATX PSU Power Supply Tester With 8 / 6 / 4-Pin Connectors

Easily test your computer power supply and avoid damage to computer equipment No batteries required Easy to read 1.8-inch LCD - Tests 24-pin or 20-pin connector, Floppy, HDD / CD-ROM, SATA, 4-pin (P4), 6-pin (PCI Express) and 8-pin (Dual CPU) connectors - Compatible with ATX, BTX, ITX power supplies +12V, +3.3V, +5V LED status lights Long buzzer sound if voltage signal is not detected or over the normal range, or if corresponding voltage value or P.G. (Power Good), flickers if the power has failed.