“Does this require a existing doorbell?”

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• Hi Emily. yes, it needs an existing mechanical doorbell chime, or you can install a 20 ohm resistor if you don't want to install a doorbell chime.

  Answered by Zmodo 7 years ago

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• Yes, you will need existing doorbell, so you can replace it with zmodo. doorbell. It is wire.

  Answered by Mike 7 years ago

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