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24V 40VA Thermostat and Doorbell Transformer, Power Supply Adapter for Nest, Ecobee, Sensi, Honeywell, Thermostat, Nest Hello, Ring Doorbell and All Versions of Ring Doorbell (UL Listed) - Amazon.com
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HQRP Tri-Volt (8V 20VA, 16V 30VA or 24V 30VA) Transformer Compatible with Ring, Nest and Standard Doorbells Door Chime Power Supply Adapter Door-Bell 120v-to-8v-16v-24v Replacement, UL Listed - Walmart.com
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N1 Common C Wire Adapter AC Transformer 24V 500mA Universal Compatible With WIFI Smart Thermostat and Doorbells. Nest, Ring, Honeywell, Ecobee, Sensi - White (2 Pack), New - Walmart.com
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Doorbell Transformer 24V Adapter for Ring Video Doorbell, 16.4ft Long C Wire Power Supply, Compatible with Ring, Nest Hello, Wyze and Eufy Video Doorbells - Amazon.com
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24V Transformer for Ring Doorbell Transformer C Wire Adapter Thermostat, 24V Doorbell Power Supply Cord Compatible with Wyze, Ring,Nest Ecobee, Honeywell and Sensi, Eufy and Nest Hello Video Doorbells - Amazon.com
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UL Listed 24V Power Adapter/Transformer,Thermostat Adapter with 196.8 inch Cable All Versions of Ring Doorbell - Walmart.com
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