This USB 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 Serial Adapter instantly adds serial communication ports to your system. By taking advantage of the USB bus, this USB Serial Adapter makes it easier than ever to add 4 serial ports and serial devices 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 port doesn't require any additional IRQ, DMA or memory on the system. The RS-232 ports function as native Windows COM ports, and it is compatible with Windows serial communication applications. Each port is individually configurable. This USB Serial Adapter provides instant connectivity to RS-232 communication devices for factory automation, multi-drop data collection devices, barcode readers, time clocks, scales, data entry terminals, ATMs and serial communications in harsh environments. This USB to Serial Adapter is suitable for remote access, retail and industrial applications, data collection and other applications requiring high speed RS-232 communication ports. For more details on product, Please refer to http://www.papyrus.co.il/4_port_rs-232_usb_to_serial_adapter_metal_case.htm