Planning to wire audio doorbell to existing chime. Can this provide power or do I need battery?

[bluefoam]

I'm seeing conflicting information online... I plan to wire the audio doorbell to an existing chime... Can this also provide power, or do I need to use batteries as well?

[jguerdat · Accepted solution]

The doorbell itself uses the batteries to operate. To use the existing chime, power from the transformer is still used but doesn't power the doorbell.