When do I need to install a wire wound resistor?
Great question, @rurzi! You only need to install a wire wound resistor when attaching a battery powered Video Doorbell directly to a power supply, as described in this help center article. The wire wound resistor is not needed for the Video Doorbell 3, 3 Plus, Pro, or Elite, and is not necessary if there is a chime kit wired in series with the Doorbell. I hope this helps!