Features: 1.The tester can be used to test your power supply and avoid damaging expensive computer equipment. 2.Equipped with digital LCD display, easy to read power voltage, convenient and time?saving. 3.A rugged voltage tester for PC power supplies to test ATX, BTX and ITX compatible power supplies and display each group of voltage and PG value. 4.Battery?free, more easier to use, can be connected to the 20 pin for Molex connector. 5.Equipped with +3.3V, +5V, +VSB, ?5V, ?12V and +12V leads for monitoring voltage output. Specification: Item Type: Power Supply Tester Material: Aluminium Alloy Support: 24Pin, ATX 20Pin Interface; for SATA Interface; 8Pin, 4Pin Interface; PCI-E Graphics 6Pin Interface; Floppy Disk Interface; ATE Hard Disk Interface Test Voltage: 3.3V, -12V, 12V1, 12V2 + 5 VSB, + 5V How to Use: 1. Insert the 24 pin of the power supply and p4, p6 or p8 into the corresponding jacks of the power supply test kit. 2. After the power is turned on, you will hear the "dudu" ringtone. If it does not flash, it means that the output voltage of the power supply is normal. 3. If a certain voltage signal is not detected, or the detected voltage value exceeds normal, a "dudu" long buzzer will be emitted; if the corresponding voltage value or pg also flashes, it indicates that the power supply has failed. PackageList: 1 x Power Supply Tester 1 x Manual