USB to RS485 Serial Converter adopts CH340T new chip, supporting WindowsXP, Vista, 32-bit / 64-bit Windows 7 etc. operating system | With TVS surge protection and USB self recovery protection, anti-interference, stable performance. | Support USB 2.0 interface, backward compatible with USB 1.1, accord with RS485 standard. | Can be inserted to personal computer, without external power supply or data line. | Small size, convenient to carry, can be used for LED displaying data communication, PLC data reading, monitoring data R&W and PTZ control, household appliances centralized control.