This VSCOM USB to 2 ports serial adapter is designed to make serial port expansion quick and simple. Connecting to a USB port on your computer or USB hub, this USB 2 ports serial adapter instantly adds 2 serial communication ports to your system with easy plug-and-play and hot-plug features. Plugging the USB Serial Adapter into the USB port, the adapter is automatically detected and installed. There is no IRQ & COM port conflicts, since the ports don't require any additional IRQ, DMA or memory on the system. The RS-232 serial ports function as native Windows COM ports, and are compatible with OS serial communication applications. The operating system allows configure of each port individually. This USB 2-port Serial Adapter provides instant connectivity to any two RS-232 communication device. For more details on product, Please refer to http://www.papyrus.co.il/usbdualportsserialrs232.htm