Ring Doorbell 3 and Pro Power Kit

Just installed a Ring Doorbell 3, and unlike most other installs of Ring doorbells (ver 1-2 & pro), they have all come with the Pro Power Kit I made the assumption that it was not required any longer since it was not in the box, but is it? The Ring doorbell works, but the physical chime does not work. I've installed a new transformer thinking that was it, but still no "ding dong" from the physical chime. I can't seem to find anything on Ring's site saying this is required like all other Ring doorbells.