Features: Enhances your systems connectivity with PCIE Serial COM to 9 Pin RS232 Expansion Card, offering integration and compatibility with multiple operating systems. This expansion card supports standard serial modes and features automatic recognition, ensuring data transmission across four independent 9 pin Port. for IT professional and enthusiasts, this expansion card to meet the needs of both industrial and personals computings. for use in industrial control machines, LED displays, POS systems, engraving machines, time clocks, telephone systems, and other devices requiring 9 pin serial connectivitys. Constructed from ABS materials, this expansion card effectively addresses complex data transfer requirements, providing stable and uninterrupted data flow for critical applications. Specifications: Materials: ABS Size:127.3x120.5x67.9mm/5.01x4.74x2.67inch Package Includes: 1PC PCIE to 4 Port RS232 Expansion Card note: Due to the screen setting difference, the item color may slightly differents from the pictures. Please allow slight dimension difference due to differents manual measurement.