Features: Diagnose and troubleshoot your laptop with precise using our 4 digit Parallel Port Diagnostic Card for accurate fault detection through POST code analysis. This diagnostic card features a flexible power supply option through USB or computer power, and displays clear 4 digit codes starting from "0000" or "FFFF" for easy identification. For IT professional and technology enthusiasts who need reliabled tool for diagnosing laptop motherboards issue. Perfectly for environment where quick and accurate laptop diagnostics essential, such as repair shops or technology support centers. For wide ranging of motherboards, this diagnostic tool ensures comprehensive fault detection, making it indispensable asset for toolkit. Specifications: Item: Computer Fault Test Card Size:about 5.6x5.7x1.50cm/2.2x2.24x0.59in Component: ABS Connection：USB Package Includes: 1Set Computer Fault Test Card note: Please allow 0-1cm error due to manual measurement. please make sure do not mind before bid. Due to difference between different monitors, the picture may not reflect the actual color.