Hi @Moldy1. Everything that's required for the installation of your Doorbell Pro will be included in the packaging. A resistor is not needed when wiring your Doorbell Pro to an existing doorbell circuit, and you can learn more about the installation process [here](https://support.ring.com/hc/en-gb/articles/209622213-Video-Doorbell-Pro-Information). I hope that helps answer your question. :)
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12-10-2020 20:37:51
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Caitlyn_Ring
Hi @Moldy1. Everything that's required for the installation of your Doorbell Pro will be included in the packaging. A resistor is not needed when wiring your Doorbell Pro to an existing doorbell circuit, and you can learn more about the installation process [here](https://support.ring.com/hc/en-gb/articles/209622213-Video-Doorbell-Pro-Information). I hope that helps answer your question. :)
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12-10-2020 20:37:51
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