RS422/RS485 /EIA Standard USB2.0; compatible USB 1.1 Baud rate: 300bps to 921Kbps Indication LED's for Power, TX and RX No IRQs, DMA or required; No Conflicts Automatic send data control. Auto detection of data speed; Zero delay automatic transmission Automatic hand-shaking protocol supported Built-in static and surge protection up to 600W; 15KV ESD protection (Electro-Static discharge) Supports multiple terminals up to 32 -485 or -422 devices Transmission distance: up to 1200 meters for -485/422 end Working modes: asynchronous; point-to-point or point-to-multipoint; 2-line half duplex and 4-line full duplex. Application fields: Factory automation system, Distributed control system, Other 485/422 serial device wireless network, LED display equipments, PLC control and management, SCADA, measuring instruments and monitoring system, CNC management, Treatment/medication automation, Building automation, Check on work attendance/ Human resource management. Colour: silver + black Material: plastic + metal Size: length 1.2 meters Package Contents: 4 x USB to 485/422 conversion line 4 x CD drive 4 x 9-pin RS232 female to 5-position terminal 4 x manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.