Product Name: Motherboard Diagnostic Card Digits: 4 LED Indicator: 8 x Red LED Interface Type: PCI Bus, ISA Bus Material: Plastic, Metal, Electrical Components 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: 50 g Compatible with both ISA bus and PCI bus. Identifies hardware faults using audible beep codes via built-in speaker. Diagnoses motherboard signals to detect issues with CPU, memory, graphics card, and other components. Displays POST (Power-On Self-Test) status codes in hexadecimal format. Supports power supply voltage monitoring for +3.3V, +5V, and +12V — LED indicators show normal operation or failure. Fully compatible with motherboards featuring PCI or ISA expansion slots. Features self-checking remote display functionality. Displays current POST code. Recalls previous POST codes with a single button press. Package Includes: 1 × Motherboard Diagnostic Card 1 × 2-Pin Cable 1 × User Manual Note: Color appearance may vary slightly due to lighting and screen settings. Dimensions are subject to a tolerance of ±1–3 cm.