SERIALGEAR 4-Port USB DB-9 Serial Adapter Solution for Windows Operating Systems

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