Welcome to the store! Our expansion card meets the PCI‑Express 1.0 a standard, and products that meet this standard can use it. The PCI‑Express speed is 2.5 Gb/s, with support for full duplex channel, just plug and play. The expansion card is compatible with the 16c550 UART standard and 256 byte transmission and reception. The FIFO data transfer rate at high speed is up to 250k/sec., which is much faster than some traditional expansion cards. The card supports Windows98/98SE/ME/2000/xp/server 2003/xp 64bit/ Vista/ win7/2008, Linux, and OX S systems. Item Type: Expansion Card Serial Interface: RS232 16c550 UART standard and 256 byte transmit/receive Fifo. High-speed data transfer rate up to 250k/sec. Supports RS-232 hardware: Compatible Control data bit length: 5, 6, 7, 8 Modem Modem Signal CTS, RI, DCD, DTR, RTS, RS232 Level Conversion: Support System Support: For Windows98/98se/me/2000/xp/server 2003/xp 64bit/ Vista/ Win7/2008, for Linux, for OS X. Equipment Requirements: An available Pci-express card slot Application Areas: Industrial computer, communication, LED control, POS machine guest display, card punching machine, telephone program control machine, telephone billing unit, serial mouse, flashing machine use, POS serial printer, access control and attendance, single-chip computer, serial connection equipment, serial monitoring equipment, data acquisition system, POS terminal and industrial computer, parallel port/print port application, additional I/O card-serial/parallel/usb, embedded system-i/o extension, PCI design and simulation, etc. 99% of other universal 9-pin serial devices are supported System Requirements: PCI-Express X1 card slot Includes: 1 x Expansion Card 1 x Compact Disc Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!