Amazon.com: HQRP 18 Volt AC Power Adapter Transformer Compatible with Smart Video Doorbells Nest Hello, Ring, Ring-2, Ring-3, Arlo, Zmodo, Eufy Power Supply, 20ft Cable, Black, ETL Listed : Electronics
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Doorbell Transformer, 18V / 800mA Power Adapter for Ring Video Doorbell, Ring Video Doorbell Pro and Ring Video Doorbell 2, Transformer Compatible with Nest Hello Doorbell and Zmodo Smart Doorbell