“If someone’s doorbell doesn’t work, they don’t want to have to call the electrician,” says Rose, of NuTone. “With wireless chimes, the homeowner can just replace the battery.

To wire a doorbell, you’ll need a: Wiring a doorbell typically involves installing an external push-button and an indoor chime that will both be connected to the transformer. Dealing with ...

The Knock is a wired smart doorbell from NuTone, a company better known for its ventilation fans and range hoods than smart home gadgetry. And in fact, the Knock is based on the D1201 video ...