Chip: for moschip mcs9900PCI e interface: PCI X1 interface, which can be used for different length PCI-E slots of X1 X4 X8 x16Interface standard: 2 RS232 standard serial ports, DB9 pinTransmission rate: 250 Kbps per serial port rate: 50bps to 250kbpsSlot specification: comply with PCI revision 1.1: for windows10 / 8 / 7 / XP / 200 / 2003-2008 32 / 64bit, Linux & , , etcDriver download address: http://.drivers-download./en/pnsearch.php?pn=EMT03CCompliant with industry standard 16C450/16C550 UARTBuilt-in 256- and built-in H/W, S/W flow control function on the chipThe data transmission rate of each serial port can reach 250Kbps rate: 50 to 250 KbpsSerial communication parameters Data bits: 5, 6, 7, 8Stop bits: 1, 1.5, 2Parity: None, Even, Odd, Space, Flow control: /, XON/XOFFI/O address: assigned by BIOS: Assigned by BIOSSerial signal -232: TxD, RxD, , , DTR, , DCD, GNDcolour: blackMaterial: PCBSize: 12cmPackage Contents:1 x AdapterOnly 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.