Welcome to the store! 1. Complies with PCI Express Basic specification version 1.0a/11. 2. PCI-Express speed: 25G/s full duplex channel. 3. Compatible with standard 16c550 UART and 16 byte send and receive FIFO, 2 serial ports transmission rate up to 1 Mbyte/sec. 4. Transmission rate: maximum transmission rate up to 115200 bps. 5. 2pcs DB9 serial port, built-in 256 byte FIFO buffer. Features: * Complies with PCI Express Basic specification version 1.0a/11. * PCI-Express speed: 25G/s full duplex channel. * Compatible with standard 16c550 UART and 16 byte send and receive FIFO, 2 serial ports transmission rate up to 1 Mbyte/sec. * Transmission rate: maximum transmission rate up to 115200 bps. * 2pcs DB9 serial port, built-in 256 byte FIFO buffer. * Supports 5,6,7 or 8 bits of data and 1 or 2 stop bits. * Supports odd, even. No result, no blank. Equivalent validation method for mark 1. * Supports full duplex and half duplex serial communication. * Driver supports Windows 98SE/ ME/2000/ XP/ Vista/ Win 7/ win 8/ Win 10 32 & 64bit DOS, Linux, Mac. * Applications: widely used in banks, securities, supermarkets, and other financial industry special equipment, such as modems, printers, scanners, cash registers, barcode scanners, keyboards, digital displays, electronic scales, data acquisition equipment, and PC-compatible systems and other series of equipment. Specification: Item Type: Network Server Adapter Material: PCB Chipset: WCH382L Host Interface: PCI-Express XI Port: 2 Standard RS232 Serial Port Transmission Rate: Each serial communication rate up to 9216 Kbps Weight: Approx. 116g Packing List: 1 * 2 Ports RS-232 Serial Port PCI-E Card 1 * Drive CD 1 * Baffle Note: Please note that the new type and old type of this product will be sent randomly, and make sure you don't mind before ordering.