INDUSTRIAL GRADE - Built-in insulated power supply and ADI signal isolation chip can effectively protect computer damage caused by accidental short circuit, electric shock and other damage. USB to RS485/RS422: Supports RS-422 (RxD+, RxD-, TxD+, TxD-, GND) and RS-485 (A +, B-, GND) interfaces. High stability: built-in original FTDI FT232RL chip, maximum speed up to 3 Mbps Compatibility: Works with Windows 10, 7 (32/64bit), XP, 2003, Liunx, Mac OS Etc. Warranty: We offer one year warranty and lifetime technical support for this isolated USB to RS485 RS422 converter. If you have any questions, please feel free to contact us. We will reply you within 24 hours.