600W static surge and 15KV ESD protection protects devices and ensures high speed data communication TX, indicators help you check communication activity, which is helpful when troubleshooting; The shielded cable supports four wires full duplex, two wires half duplex; point to point, point to multi-point communication;Transmission distance up to 1.2 km at at rate of 9600 (the distance, the lower rate);Terminal block is -labeled to wire it to your device correctly! Item Features / Specifications : Color: silver + gray Material: PVC new and high quality Serial Protocol: RS485 / RS422; USB 2.0; EIA/ RS485 and RS422 standard; Chip: ; Max 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: 50cm / 1.6ft Chip supports the widest possible OS compatibility: Win 10, 8, 8.1, 7, Vista, XP, Linux and Note: the code to download Package Contents: 1 * USB to Serial Converter Cord 50cm 1 * RS422 RS485 Serial DB9 to Terminal Block Adapter 1 * manual Only the above package content, other products are not included. Note: Light 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.