The USB converter designed for use in rugged application area. USB converter adds a Window serial port via its USB connection and can be configured to work with RS-422 and RS-485 peripherals such as industrial control devices. USB converter features a full st of RS-422/RS485 data and control signals on its RJ11 jack. It supports data transfer rate up to 3Mbps. No external power supply is required as USB converter takesits power from the USB bus. Full compliance with the USB Specification 1.1 Compatible Windows98/SE/ME/2000/XP/Vista/7. Mac OS 8.6/OS-9/OS-X, Linux **Download the latest driver including Win7