Specific: Serial Protocol: RS485 / RS422 Specification: USB 2.0; EIA/TIA RS485 and RS422 standard Chip: FTDI Max Baud Rate: 921600bps Max Distance (RS485/422 End): 984ft (300m) at 921600bps, 1968ft (600m) at 38400bps, 3937ft (1.2km) at 9600bps; USB-bus powered, no external power needed. Automatic hand-shaking protocol supported. Item Length: 1.5 Feet Important Note: The USB end must be connected to PC or Mac. Other USB devices like digital camera, scanner and printer is not allowed. To avoid reflections on longer cables it is necessary to use appropriate termination resitors (120Ω, 1/4W). Please do NOT connect the adapter to RS422/ RS485 device until you install the driver on your computer or Mac. 4 Kinds of Working Modes: Asynchronous Point to point / four wires full duplex; Point to multiple point / four wires full duplex; Point to point / two wires half duplex; Point to multiple point / two wires half duplex. Applications: Factory automation system Distributed control system LED INFO display equipment PLC control and management CNC management SCADA(Supervisory control and data acquisition) Medical treatment/medication automation Building automation Check on work attendance Human resource management. Measuring instruments and monitoring system Data collection Process contro material: plastic Color as shown Package Contents: 2 x USB to Serial Converter Cord 2 x RS422 RS485 Serial DB9 to Terminal Block Adapter