Features:1 LCD's indicate the status of voltage 2 The power supply tester is a robust voltage, tester for PC-power supply, ATX BTX and ITX compliant, power supplies can be tested 3 The PC/ SPS is suitable for the ambitious hobby user, as well as for a quick functional check in specialized trade 4 The methods of operation:Plug power supply 24 PIN and P4 , P6 or P8 into the corresponding jack of the power test suite Description:1 Power on the supply of power, will hear "DuDu" ring , if no flicker then the power supply output voltage is normal 2 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 Specification:Voltage source: 20/24 pin ( ATX - connector )Voltage test: +12V , -12V , +5V , -5V , +3 3V , +5V Stand by (SB) 12V power Good ( PG )Connectors: Floppy, HDD , CDROM , SATA , 4pin ( P4 ) , 8pin ( Dual-CPU ) , 6pin ( PCI-Express )DIY supplies: ElectricColor: BlackMaterial: Plastic & ElectronicsSize ( about ): 12 x 6 5 x 1 5 cmPacket Included:1 x Power supply testerNotes:1 Due to the difference between different monitors, the