Definitely install it if you have a Mech. Chime...It regulates power. Below is for the Ring, but all Smart Doorbells work pretty much the same.
What's inside the Pro Power Kit?
Ahhhh ok. This is helpful. Power kit it is then. Should I get a transformer that allows more power than what I currently have now too? I realize I could just plug it in an try it, but I don't want to burn it out or get poor performance by under/over powering it.