Description:This PCI Express serial card, is specially designed for POS and ATM applications. The product with WCH382L chip supports a variety of mainstream operating systems, including Windows and Linux. In addition, the extended 2 rs-232 serial ports can support the communication rate of 230.4 Kbps, and provide modem control signals to ensure compatibility with all kinds of external serial port devices. Since the card is PCI Express "x1", it can be installed on various PCI Express slots (including 4x 8x16x).Features:Two (2) 9-pin RS-232 serial ports.PCI Express x1 interface (will also work on PCI-E x4, x8, x16 slot).Compliant with PCI Express specification Revision 1.1.PCI Express single-lane (x1) bus bandwidth 2.5 Gbps.Support DOS, Windows 8/7 / Vista/XP / 2000 / Server 2003-2008 32/64-bit, Linux operating systems.Serial Interface (RS232):Comply with industrial standard 16C450/16C550 UARTOn-Chip 256-bit depth FIFOs in Transmit, support H/W, S/W flow controlData transmission rate of each serial port can be up to 250Kbps Baud rate: 230.4 KbpsSerial communication parameter data bits: 5, 6, 7, 8Stop bit: 1, 2Parity: None, Even, Odd, Space, MarkFlow control: RTS/CTS, XON/XOFFI/O address: Assigned by the BIOSIRQ: Distributed by the BIOSSerial signal RS - 232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GNDSpecifications:Chip: WCH382LType: PCI-E to Serial Interface CardInterface: 1 x PCI-E, 2 x Serial Operating Systems: Support DOS, Windows 8/7 / Vista/XP / 2000 / Server 2003-2008 32/64-bit, Linux operating systems.Package weight: 101gPackage Included:1x PCI-E to Dual Serial Port Controller Card1 x Drive CD