The Knock does its job, but its motion sensor produced too many spurious alerts and there’s also no way to download captured footage. The Knock is a wired smart doorbell from NuTone, a company better ...
We've tested and reviewed products since 1936. Read CR's review of the Broan-NuTone 80 CFM Ventilation Fan with Interchangeable Bulb (HB80RL) bathroom to find out if it's worth it.
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