Industrial grade USB to RS485 RS422 converter. It easily lets you connect any RS485 or RS422 device directly to your computer's USB port | The main chip is FTDI FT232RL. Built-in 15KV ESD protection and TVS overvoltage protection. Enough for you to deal with different occasions. | LED for RX TX and Power. | Works with Windows 10, 7(32/64bit) Vista 2008, XP, 2003,Mac Etc. | WARRANTY:We back this usb to RS422/RS485 Converter with 12 months warranty.If you meet any question, Please contact us, We will fix your issue within 24 hours.