Product Name: Motherboard Diagnostic Card; Digits: 4 LED Indicator: 8 x Red LED; Interface Type: PCI Bus, ISA Bus Material: Plastic, Metal, Electric Parts; Color: Green, Black Card Size: 9 x 8.2 x 1.5cm / 3.5 \" x 3.2 \" x 0.6 \" (L*W*H); Cable Length: 30cm / 11.8 \" Weight: 50g Both ISA bus and PCI bus are suitable. Determine defects by differences in sound coding with built-in speaker. Diagnose the motherboard signal that shows the problem of CPU, memory and video card etc. The POST code display consists of a , dot hexadecimal readout that displays On Self Test (POST) status codes. Support for the source's working indicator -- +5V,+12V,+3.3V and 12V (When the indicator LED is on to indicate that it is in order, otherwise to indicate that it is faulty.) Fully compatible with all types of motherboards that have PCI and ISA bus slot. Self-testing remote display. 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 shooting 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.