If you are thinking of installing a smart door bell, you might like to read the
following from MarwareBytes.
https://tinyurl.com/wr9coyd
or the full URL is:
https://blog.malwarebytes.com/please-dont-buy-this/2019/12/please-dont-buy-this-smart-doorbells/?utm_source=double-opt-in&utm_medium=email-internal-b2c&utm_campaign=EM-B2C-2019-December-newsletter-Issue1&utm_content=smart-doorbells
George