DSD TECH: DSD TECH focuses on the development of communication connection devices such as USB/Serial/Wireless.We have served more than 100,000 customers in Europe, North America and Japan. USB to RS485/RS422:Industrial grade USB to RS485 RS422 converter. It easily lets you connect any RS485 or RS422 device directly to your computer's USB port FTDI FT232R Chip:Built-in industrial grade FTDI FT232RNL/FT232RL chips, no need to worry about driver problems. Suitable for Windows 11, 10, 8, 7, Liunx, Mac OS and other operating systems. Indicators: Built-in power and transceiver indicators. Understand the working status of the device at a glance. Customer Support: DSD TECH provides permanent technical support and 1 year product replacement service for this USB to RS485 RS422 Converter.All questions will be answered within 1 working day.