usb to serial conveter 1.USB to 4-port RS232 serial port converter Features:1.Computer interface: USB V1.1 2. ... Plug and Play.2.Operational system virtual serial port driver.3.USB to 4-Port RS-232 serial Supports Windows 95/98/ ... Me, 2000, 2003, XP, Vista,Win7, CE, Linux ,MAC.4.Field ... power input backup) USB to serial converter/USB to 4-Port RS-232 Hub