Harmony Touch remote?

I have an older Harmony One, which presumably uses the same WDTV Live instruction set as the Touch.  I can confirm that pressing the soft Power button for the device for 2 seconds does a full shut down.

Other commands function well, but are slightly limited.  You can do things like pick Options, Setup, Subtitles and as per my recent Guide, you can set up a sequence for FF and Rewind.