Features: 100% brand new and high quality. Diagnose defects through various sound codes with the built-in speaker. Suitable for both ISA bus and PCI bus. Diagnoses motherboard signals, displaying issues with CPU, memory, graphics card, etc. The POST code display consists of a dual, dot-matrix hexadecimal readout that shows Power On Self Test (POST) status codes. Supports power source working indicator -- +5V, +12V, +3.3V, and -12V (When the indicator light is on, it signifies that the respective power is good; otherwise, it indicates that the respective power is not functioning). Fully compatible with all motherboards with PCI and/or ISA bus slots. Self-checking remote display function. Dual POST code display: users can read the POST code at the PCB component. It's easy to see the POST code when the user connects the POST card to the computer system. Retrieves previous POST codes with a single button press. Dimensions: 90mm x 82mm. Quantity: 1 pc. Package Includes: 1 x Main Diagnostic Card 1 x Ribbon Cable