Adds four RS-232 DB9 serial ports by connecting to a Single USB port
Rugged plastic housing with built-in LED status indicators for TxD and RxD
Full RS-232 modem control signals and hardware/software flow control
High speed serial port with the baud rate up to 921.6K bps
OS Support: Windows 7, Windows 8, and Windows 10 Linux and Mac OS 10.X