In its most basic mode, the Apathy allows you to command all 512 DMX dimmers to the same level using the single intuitive control knob. Using the Apathy function button, you can assign control of a single DMX dimmer to the control knob.  See datasheet link for detailed function button options.

5-pin XLR connection for DMX output.

Runs for hours on 9V battery.  Jack included for using external PSU (not included).