Industrial Grade USB to RS485 RS422 Converter: This allows you to easily connect any RS485 or RS422 device directly to the USB port of your computer The main chip is FTDI FT232RL: ESD protection with built-in 15KV and TVS surge protection. It is enough for you to cope with different occasions. LED for RX TX and Power. Compatible with Windows 10, 7 (32/64bit) Vista 2008, XP, 2003, Mac etc. : We offer a 12-month for this USB to RS422 / RS485 converter. If you have any questions, please contact us and we will solve your problem within 24 hours.