Welcome to our store! 1. Compatible with PCI Express Base Edition 1.0a / VI specifications. 2. PCI-Express speeds up to 2.5G/S full duplex channels. 3. Compatible with standard 16c550 UART and 16-byte transmit-receive FIFO, 2 serial port speeds up to 1Mbyte/sec. 4. Transmission Speed: The maximum transmission speed can reach 115200bps. 5. Two DB9 serial ports, built-in 256-byte FIFO buffer. Features: 1. Compatible with PCI Express Base Edition 1.0a / VI specifications. 2. PCI-Express speeds up to 2.5G/S full duplex channels. 3. Compatible with standard 16c550 UART and 16-byte transmit-receive FIFO, 2 serial port speeds up to 1Mbyte/sec. 4. Transmission Speed: The maximum transmission speed can reach 115200bps. 5. Two DB9 serial ports, built-in 256-byte FIFO buffer. 6. Supports 5, 6, 7, or 8 data bits and 1 or 2 stop bits. 7. Supports odd and even parity, invalid test, space, mark 1, and other test modes. 8. Supports full-duplex and half-duplex serial port communication. Specification: Chip Solution: ASIX99100 Bus Type: PCI-ExpressX1 Interface: RS232 Transmission Speed: 1.5 MB/S Package List: 1 * Adapter Card 1 * CD 2 * Card Baffles Your satisfaction is our top priority. We are committed to providing you with the best service. If you encounter any issues after receiving the product, such as damage or incorrect quantity, please contact us immediately for the best solution!