SERIAL PORT EXPANSION: The 4-port RS232 serial controller card expands an M.2 port to four RS232 serial ports, providing more serial ports for industrial control devices. HIGH-SPEED TRANSMISSION: The M.2 controller card supports high-speed data transmission, ensuring stable and fast data transmission to meet the requirements of industrial control equipment for data transmission speed. COMPATIBILITY: The M.2 4 serial port controller card is compatible with a variety of operating systems, including for Windows, for Linux, etc. It is suitable for a variety of industrial control equipment and compatible with existing systems. EASY INSTALLATION: The adapter card adapter is simple and convenient to install, no need for additional drivers, plug and play, saving users time and effort. DURABLE: The M.2 4 serial port controller card is made of PCB material with excellent durability, which can run stably for a long time and extend the service life of industrial control equipment. Item Type: M.2 to 4 Port RS232 Serial Card Adapter Material: PCB Adapter Type: M.2 to 4 Port RS232 1 x M.2 to 4 Port RS232 Serial Card Adapter