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

Superior Build Quality: Housed in a rugged steel chassis with built in mountable flanges, the serial adapter hub is perfect for installations in labs, warehouses, or heavy machinery. | Safe Industrial Connections: Designed for use with Bar Code Scanners, Time Clocks, Label Printers, Point of Sale Terminals, Receipt Printers, and more the USB to Serial Adapter offers 15kV surge protection for connected devices. | Effortless Port Configuration: The adapter is designed with external dip switches to set RS-232, RS-422 or RS-485 ports and different operation modes conveniently. | COM Retention: COM Ports are fully configurable, and after reboots, port assignments are preserved. | USB Power: Power is drawn from a USB connection, no bulky power supply or power outlet is required.