Easy RS422/485 Conversion from RS232 PortSupports 4-wire RS422 , 2-wire and 4-wre RS485 applicationsSupports RS485 Auto Transceiver Turn Around With the Unique Featured ATTA HardwareAutomatic Baud Rate DetectionDB9-Female (RS232) to 5-pin Terminal Block Connector ConversionCompact Size for Critical ApplicationsNo Driver Required for All Operating Systems5V/1A 100~240VAC Power Adapter included