Chip: for Moschip MCS9900 PCIe Interface: PCI-E X1 interface, compatible with PCI-E slots of various lengths (X1, X4, X8, X16) Interface Standard: 2 RS232 standard serial ports, DB9 pins Transmission Rate: 250 Kbps per serial port Baud Rate: 50bps to 250kbps Slot Specification: Complies with PCI revision 1.1 Operating System: for Windows 10 / 8 / 7 / XP / 200 / 2003-2008 32 / 64bit, Linux & etc. Driver Download Address: http://wwwdrivers-downloadcom/en/pnsearchphp?pn=EMT03C Complies with industry standard 16C450/16C550 UART Built-in 256-byte FIFO and on-chip hardware/software flow control function Data transfer rate for each serial port can reach 250Kbps Baud Rate: 50 to 250 Kbps Serial Communication Parameters: Data Bits: 5, 6, 7, 8 Stop Bits: 1, 1.5, 2 Parity: None, Even, Odd, Space, Mark Flow Control: /, XON/XOFF I/O Address: Assigned by BIOS IRQ: Assigned by BIOS Serial Signal -232: TxD, RxD, , , DTR, DSR, DCD, GND color: black Material: PCB Size: 12cm Package Contents: 1 x Adapter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.