Features 1. Two (2) 9-pin RS-232 serial ports. 2. PCI Express x1 interface (also works on PCI-E x4, x8, x16 slots). 3. Compliant with PCI Express specification Revision 1.1. 4. PCI Express single-lane (x1) bus bandwidth 2.5 Gbps. 5. Supports DOS, Windows 8/7 / Vista/XP / 2000 / Server 2003-2008 32/64-bit, Linux operating systems. Specification Description: This PCI Express serial card is specially designed for POS and ATM applications. The product with WCH382L chip supports a variety of common 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 types 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 (also works on PCI-E x4, x8, x16 slots). Compliant with PCI Express specification Revision 1.1. PCI Express single-lane (x1) bus bandwidth 2.5 Gbps. Supports DOS, Windows 8/7 / Vista/XP / 2000 / Server 2003-2008 32/64-bit, Linux operating systems. Serial interface (RS232): Complies with industry standard 16C450/16C550 UART On-Chip 256-bit deep FIFO in transmission, supports H/W, S/W flow control Data transfer rate for each serial port can be up to 250Kbps Baud rate: 230.4 Kbps Serial communication parameter data bits: 5, 6, 7, 8 Stop bit: 1, 2 Parity: None, Even, Odd, Space, Mark Flow control: RTS/CTS, XON/XOFF I/O address: Assigned by BIOS IRQ: Distributed by BIOS Serial signal RS - 232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND Specifications: Chip: WCH382L Type: PCI-E to Serial Interface Card Interface: 1 x PCI-E, 2 x Serial Operating system: Supports DOS, Windows 8/7 / Vista/XP / 2000 / Server 2003-2008 32/64-bit, Linux operating systems. Package weight: 101g Package Includes: 1x PCI-E to Dual Serial Port Controller Card 1 x Driver CD Package list