Specification:100% new and high quality. It is used to test motherboard problems. It is fit for desktop with PCI to which POST codes is output. 8 LED indication, easy to read LED Display on the Display, LED displays shows diagnosis result of motherboard. Diagnosis the motherboard signal which show the problem of CPU, Memory, display card and so on. The POST code display is made up of a dual, dot matrix hexadecimal read-out that display's Power On Self Test (POST) status codes. Support the power source working indicator -- +5V,+12V,+3.3V and 12V(When indicator LED is on to indicate its respective power is fine, otherwise to indicate its respective power is failure). Help you remove the most headachy fault which sometimes normal but sometimes wrong. Dual POST code display - User can readout the POST at PCB component and solder side. It is easy to view the POST code when user plugs the POST card in computer system. Easy and quick to install, four-bit code is displayed. The value of four-bit-code PC Analyzer's "initiative code" is specified and it is "0000" or "FFFF"." initiative code" is clear at a glance. While the value of conventional two-bit-code PC Analyzer's "initiative code" is uncertain and man is unable to distinguish accurately by unaided eye. Extra cable LED will be convenient for user to observe the code when the PC diagnostic card is insert in the narrow PC case. Dimension:80 x 58mm (L x W).Package Includes:1 x PC Analyzer 4Digit + Manual