Sophisticated Circuits PowerKey Pro 200 User Manual page 63

At Shut Down
This Trigger activates whenever you select "Shut Down" from
the Finder's Special menu, or when another application (such
as Retrospect) tells the computer to shut down. It also activates
on newer Macs when you shut down by pressing the "Power
On" key. Use this Trigger to turn your computer and peripher-
als off when you select "Shut Down".
4: Reference Page 63