PCIE 1x to 4-port 2-port RS232 serial card, 2-port 4-port expansion card, desktop computer universal COM card

Flexible 2-Port / 4-Port Options: Professional PCIe serial card available in dual-port or quad-port configurations. Scalable expansionchoose 2 COM ports for basic needs or 4 ports for multi-device industrial applications.

RS232 Serial Expansion: Adds independent RS232 COM ports with standard 9-pin DB9 connectors to desktop computers. Solves serial port shortageessential for connecting legacy equipment, industrial devices, POS systems, and specialized peripherals.

Universal Desktop Compatibility: Standard PCIe x1 interface fits all desktop motherboards with available expansion slots. Works with standard ATX, micro-ATX, and mini-ITX systemsversatile solution for business, industrial, and home office computers.

Full RS232 Signal Support: Each port provides complete RS232 functionality including TX/RX, RTS/CTS, DTR/DSR signals. Universal connectivity for serial mice, modems, barcode scanners, label printers, scales, CNC machines, and automation equipment.

Plug-and-Play Installation: Automatic driver recognition on Windows 7/8/10/11, Linux, and legacy operating systems. Recognized as standard COM portsseamless integration with existing serial communication software, terminal applications, and industrial control systems.