My house was built in the 1930s and does not have a neutral or ground wire for light switches. Can I use the S500 or S500D with no ground wire?

We just purchased and installed a wired Kasa doorbell camera. It's great and works perfectly. But we need a 2nd plug-in chime for the 2nd level of our home. I can't find anywhere to order one. Do they

How do I sync my existing Kasa KD110 doorbell to my new Tapo H100 hub - so that the chime will sound from both the KD110 chime module as well as through the Tapa H100 hub?

I have a KD110 Kasa doorbell which I would like to have an extra chime module for. I'm also thinking about getting a Tapa hub . Will/can the chime of of my KD110 doorbell be annunciated on both the KD