SMAKN&reg; Isolated USB to RS485 Converter with Surge protection USB directly take electricity without external power supply, stable performance; And all kinds of 485 interface docking, transmission distance up to 1200 meters. With anti-lightning, and anti-static shock, slew-rate-driven, effectively curb electromagnetic interference. Solve the valid signal and the invalid signal is superimposed on the transmission circuit. Error-free data transmission rates up to 115200bit. Therefore, this product line using ordinary data communications data lines can be used.