Features: Allows to connect more serial & parallel device to your computer easily. Two (2) 9-pin RS-232 DB9 male serial ports and one DB 25 female parallel LPT port available. Compliant with PCI Express specification Revision 1.1. PCI Express single-lane (x1) bus bandwidth 2.5 Gbps. Support for DOS, for Windows 8 / 7 / Vista / XP / 2000 / Server 2003-2008 32/64-bit, for Linux operating systems. Parallel interface (LPT): I/O address: Assigned by the BIOS IRQ: Distributed by the BIOS Support SPP, PS2, EPP & ECP mode Serial Interface (RS232): Comply with industrial standard 16C450/16C550 UART On-Chip 256-bit depth FIFOs in Transmit, support H/W, S/W flow control Data transmission rate of 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 the BIOS IRQ: Distributed by the BIOS Serial signal RS - 232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND Specifications: Chip: WCH382L Type: PCI-E to Serial + Parallel Interface Card Interface: 1 x PCI-E, 2 x Serial, 1 x Parallel Operating Systems: Support for DOS, for Windows 8 / 7 / Vista / XP / 2000 / Server 2003-2008 32/64-bit, for Linux operating systems. Package weight: 125g Package Included: 1x PCI-E to Dual Serial Port + Parallel Port Controller Card 1 x Drive CD . Note: Please note that the new type and old type of this product will be sent randomly and make sure you will not mind before ordering .