This Diagnostic Card will indicate exactly what is wrong with your notebook in just seconds.With this card in hand，you no longer have to go through tedious and time consuming process of trying to figure out what is wrong with your hardware. Features:100% Brand New and high qualitySize ( about ): 6 x 5.5 x 1.5cmM/M USB cable Length: 51cmInterface Type: 25 pin male printer connectorNo need to install ANY software.2 keys for codes PREV /NEXTLet 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 powered via USB port.Compliant to the PHOENIX BIOS 4.01~6.01 laptop and desktop.Compliant to the AMIBIOS 6.24， AWARD BIOS 4.51 laptop and desktop.Concrete computer type: IBM， T20， T21， T22， T23， A20， A21， A22， DEL L640，TOSHIBA 4030， etc.Compatible with the following BIOS Chip Manufacturers:ACER - AMI - AST - AT&T - Award - Chips & Tech - Compaq - Dell - DTK -EuroSoft - Mylex - Faraday - HP - IBM - Landmark - Mr. BIOS - NCR -Olivetti - Phillips - Phoenix - QuadtelPackage Included:1 x USB PCI PC & LAPTOP Diagnostic Analyzer 4 Digit Card Motherboard Post Tester1 x USB Charging Cable1 x User Manual