It's real COM Port in your computer, not USB to COM port
high compatible with serial type device.
Mini PCI 2 Serial RS422/RS485 in Windows XP Device Manager
* Fully compliant with PCI Local Bus Specification Rev 2.3
* Built-in TWO IMPROVED 16C1050 UART with 256-byte Deep FIFO128K byte DMA software FIFO
* Software/Hardware Flow Control & Xoff Re-Transmit Function
* Easy Plug and Play Installation
System Requirements:
* Windows® 98/2000, XP, Server 2003 ,Vista ,Win7 and Linux 2.4& 2.6
