Button Used to Alert a Homeowner You Are Visiting

Puzzle 2 of Bath Time Piece of Cake Pack

Question is: Button Used to Alert a Homeowner You Are Visiting

and the answer is: DOORBELL

Word Meaning:

DOORBELL — A bell, buzzer, or chime device mounted on or adjacent to a door's exterior, meant to be rung by a visitor to announce one's presence.

Definitions from Wiktionary.

Button used to alert a homeowner you are visiting Bath Time Answers | CodyCross Solutions