Features:100% Brand New.Both ISA bus and PCI bus are suitableDetermine defects by difference sounds coding with build-in speakerRecall previous post codes at the touch of a buttonIt can diagnosis the motherboard signal which show the problem of CPU， Memory， video card， etc The POST code display is made up of a dual， dot matrix hexadecimal read-out that display's Power On Self Test (POST) status codesSupport 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.)Fully compatible with any kind motherboards which has the PCI and ISA bus slotSelf checking remote display functionDual 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 Package Content: 1 x Main diagnostic card 1 x English Manual