Description: Desktop PC Computer LED 20\/24 Pin 4 ATX BTX ITX SATA HD HDD Power Supply Tester Features: 1. 100% brand new and high quality. 2. The SD power supply tester is a robust voltage tester for PC-power supply. 3. ATX, BTX and ITX computer power supplies can be tested. LED`s indicate the status of voltage . 4. The PC \/ SPS is suitable for the ambitious hobby user , as well as for a quick functional check in specialized trade. Specification: 1. Voltage source:20\/24 pin(ATX - connector) 2. Voltage test : +12V , -12V , +5V , -5V , +3.3V , +5V Stand by (SB) 12V power Good ( PG ) 3. Connectors : Floppy, HDD , CDROM , SATA , 4pin ( P4 ) , 8pin ( Dual-CPU) , 6pin ( PCI-Express ) 4. Size: 75mm x 61mm x 19mm The methods of operation: Plug power supply 24 PIN and P4 , P6 or P8 into the corresponding jack of the power test suite Power on the supply of power, will hear "DuDu" ring , if no flicker then the power supply output voltage is normal. If a certain voltage signal was not detected, or the detected voltage value over the normal, will issue a "DuDu" long buzzer ; if the corresponding voltage value or PG flicker too, then the power is failed. Package includes: 1 x Power supply tester Details pictures: