Hi @BartM. The Door View Cam cannot be hard-wired or connected to an existing chime kit in your house. The Pro Power Kit is only able to be used with the Video Doorbell Pro. You can look into a Chime or a Chime Pro to be notified inside your home of when someone is at the door as it will wirelessly connect to the Door View Cam and play an audible alert when someone rings the bell. I hope that helps answer your questions!