4/16/2008: Please see the Read Me First page before creating new pages (and also if you plan to edit any; you can help clean up the site while you improve/expand the content). --OS-9 Al

From CoCoWiki

This was a small device (square epoxy covered PCB) which when connected to the CoCo3 innards (via Clip leads) would cause the screen to Dim after a certain period of inactivity.