Features: 1.The expansion card is compliant with PCI?Eepress 1.0 a standard, making the product reliable to be used. 2.PCI?Express speed is up to 2.5Gb/s, which can ensure stable and fast work and greatly improve our working efficiency. 3.The product is compatible with 16c550 UART standard and 256?byte transmission and reception. 4.The expansion card supports remote wake?up and power management functions, convenient and practical. 5.The serial expansion card supports MODEM modem signal CTS, DSR, RI, DCD, DTR, RTS, RS232 level conversion. 6.The product is widely applicable to industrial computer, communication, medical equipment, LED control. specification:Item Type: PCI?E 2 Port Serial Expansion Card Material: PCB Colour: Black Chip: WCH382L Transfer Type: PCI-E to 2xCOM FIFO High-Speed Data Transfer Rate: Up to 250k/sec Support RS-232 Hardware Flow Control Data Bit Length: 5, 6, 7, 8 Equipment Rrequirements: An available PCI-Expresscard slot System Support: For Windows98/98SE/ME/2000/xp/Server 2003/xp 64bit/ Vista/ Win7/2008, Linux, OS X, etc. Application Areas: Industrial computer, communication, medical equipment, LED control, POS machine guest display, engraving machine, engraving machine (such as: pickup, map king, etc.), punch card machine, telephone program control machine, telephone billing device, serial mouse, flashing machine Use, POS serial printer, access control and attendance, single-chip microcomputer, serial connection equipment, serial network/monitoring equipment, data acquisition system, POS terminal and industrial PC, parallel port/print port application, additional I/O card-Serial/Parallel /USB, embedded system-I/O expansion, PLC design and simulation, etc. Other 9-pin serial port general equipment. How to Use: 1. Open the computer case and remove the rear baffle 2. Insert the riser card into the corresponding PCI-Expres slot 3. Power on after installing the chassis, read the driver disk, and use it after installing the driver PackageList:1 x ExpansionCard 1 xDriver Disk