Welcome to our store! PCI-E 4-Port RS232 Serial Port Card. Expands 4 independent 9-pin standard serial ports, acting as the built-in serial port data interface. Designed for POS and ATM applications, making it a smart choice for system integrators in industrial automation. The four RS232 serial ports on the riser card support communication speeds up to 250 Kbps and provide modem control signals to ensure compatibility with various peripheral serial devices. Stable and efficient control of data loss. Supports hot swapping. Features: PCI-E 4-Port RS232 Serial Port Card. Expands 4 independent 9-pin standard serial ports, acting as the built-in serial port data interface. Designed for POS and ATM applications and a smart choice for system integrators in industrial automation. The four RS232 serial ports on the expansion card support communication speeds up to 250 Kbps and provide modem control signals to ensure compatibility with various peripheral serial devices. Stable and efficient control of data loss. Supports hot swapping. Multi-system support: For Windows 7/8/10/LINUX. Supports a variety of common operating systems. Specification: Type: Adapter Card Material: PCB System Requirements: For Windows 7/8/10/LINUX Size: Approx. 12 * 9.5 * 2 cm / 4.72 * 3.74 * 0.78 inches Weight: 98g Package List: 1 * Converter Card 1 * Adapter Connector 1 * Baffle Note: Please note that the old and new type of the product will be sent randomly, and make sure you will not mind before ordering.