The StarTech.com ICUSB2322X USB Serial Adapter Hub converts a single USB port to two RS232 Serial Ports. You can connect it to monitor and control any serial device. This professional USB serial adapter retains assigned serial COM port values. It allows the same values to automatically be re-assigned to the serial ports provided by the adapter in the event of the disconnection or re-connection to the host computer. It features sturdy construction with an all-metal enclosure and wall-mount brackets for durable performance. The dual buffer feature enhances both downstream and upstream data transfer. This innovative serial USB adapter is an ideal solution for connecting industrial RS232 serial devices to computers with unused USB ports. You can connect serial modems, barcode scanners or any device with serial sync to a host computer USB port. The USB to RS232 serial adapter hub can be powered with any available USB port, so an external power adapter is not required.