Determine defects by difference sounds coding with build-in speaker. Fully compatible with any kind motherboards which has the PCI and ISA bus slot. new and high quality It 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 codes., Weight: 0.17857443222 pounds, Manufacturer: Jaywool