ITEM NAME:PC&laptop diagnostic analyzer 4 digit card motherboard post tester M&O Features: 100% Brand New and high quality Size ( about ): 6 x 5.5 x 1.5cm M/M USB cable Length: 51cm Interface Type: 25 pin male printer connector No need to install ANY software. 2 keys for codes PREV /NEXT Let you know the error of your computer without opening your Laptop and desktop with 25 pin printer port. Intercept and hex the code of your booting computer. 5 LED indicator: +12, -12 +3V3, CLK, FRAME. Hexadecimal character display. Detailed & precise Code Indication Table, convenient for you consulting. Come with USB A-Type male cable, directly.Let you know the error of your computer without opening your Laptop and desktop with 25 pin printer port. Compliant to the PHOENIX BIOS4.01~6.01 laptop and desktop. Compliant to the AMIBIOS 6.24, AWARD BIOS 4.51 laptop and desktop.