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Hello ChauD, Ring Doorbell 3 is powered by a rechargeable, Quick release battery pack. But it can be hardwired to an existing doorbell system or transformer with 8-24 VAC, 40VA max, 50/60Hz for continuous charging. For any additional questions or concerns, please feel free to reach out on our community forum at https://community.ring.com/. Thanks, Alexis with Ring
Sorry, there was a problem. Please try again later.Ring door bells operate on 4 to 24V AC and require a voltage adapter stepping down 120V. which is sold as an accessory. It is an AC to AC adapter w Max power output of 40VA.
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