Mimolite doorbell - is the wallwart necessary?

Was thinking of following a few threads on here about wiring a mimolite to my wired doorbell, but couldn’t figure out if I needed to power the mimolite with a wallwart or if it can be powered w/ the power from the doorbell.

Seems like this answered my question :slight_smile:
http://forum.micasaverde.com/index.php?topic=25272.0