The USB to 8-port RS232 adapter is a USB to Serial adapter designed to make serial port expansion quick and simple. Connecting to a USB port on your computer or USB hub, the USB eight port serial adapter instantly adds eight RS-232 serial communication ports to your system. By taking advantage of the USB bus, the USB Quad Serial Adapter makes it easier than ever to add serial ports and serial devices to your system with easy plug and-play and hot plug features.Features:Adds eight RS-232 DB9 serial ports by connecting to a Single USB portRugged plastic housing with built-in LED status indicators for TxD and RxDInstalled as standard Windows COM portFull RS-232 modem control signals and hardware/software flow controlRS-232 data signals: TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GNDHigh speed serial port with the baud rate up to 921.6K bpsNon-standard baud rates supportedSerial port protected with surge protection of 10KVPowered by USB port, no external power adapter requiredEasy plug and play installation and RS-232 device connectionCOM port number assigned can be changed to any COM port number requiredWorks with USB 1.1 & 2.0 host port