Product Name : Motherboard Diagnostic Card;Digits : 4 LED Indicator : 8 x Red LED;Interface Type : PCI Bus, ISA Bus Material : Plastic, Metal, Electrical Parts;Color : Green, Black Card Size : 9 x 8.2 x 1.5 cm / 3.5" x 3.2" x 0.6" (L*W*H);Cable Length : 30 cm / 11.8" Weight : 50g Both ISA bus and PCI bus are suitable. Determine defects by difference sounds coding with build-in speaker. Diagnose the motherboard signal which shows the problem of CPU, Memory, and display card and so on. The POST code display is made up of a , dot hexadecimal read-out that display's On Self Test (POST) status codes. Support the source working indicator -- +5V,+12V,+3.3V and 12V(When indicator LED is on to indicate its respective is fine, otherwise to indicate its respective is failure.) Fully compatible with any kind motherboards which has the PCI and ISA bus slot. Self checking remote display function. POST code display. Recall previous post codes at the touch of a button. Package Content : 1 x Motherboard Diagnostic Card 1 x 2 Pin Cable 1 x User Manual Note:Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.