Plug'n'Play. What's supposed to be! Tested on Win XP32. Plugged in. Drivers found. Installed- Go! Communication with temperature controllers and Watlow Watlow PM parameterization work right away and without any problems. Purchase reasons were: * FTDI Chip * 3-wire connection (So in other RS485 interfaces also Gegensatzu'zu GND! * Plug RS485 connection * USB-B jack instead of USB-A connector (I personally hold an advantage, but is a matter of taste.