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: Amazon.com: Tools & Home Improvement
Doorbell Transformer, 16V, 30VA Comptible with Ring Pro,Nest Hello - - Amazon.com
HQRP 120V-240V to 24V 40VA Transformer Compatible with Nest, Ecobee, Sensi, Honeywell Thermostat, Nest Doorbell and All Versions of Ring Doorbell Power Supply Adapter Door-Bell 120v-240v-to-24v, UL - - Amazon.com
16v 30va Doorbell Transformer Compatible with Ring Video Doorbell Pro, Nest Hello and Zmodo Smart Greet Wi-Fi Video Doorbell,Hardwired Door Chime Transformer - - Amazon.com
Amazon.com: weideer Input 110V 50/60HZ Output 24V 10VA Power Transformer AC/AC Single Phase Transformer for Lighting Power Supplies, Audio Equipment etc. Various Small Power Supplies K-030 : Electronics
Doorbell Transformer 16V 30VA AC Power Supply Thermostat Power Adapter Hardwired Door Chime Transformer - - Amazon.com
HQRP 16V 30VA Transformer Compatible with Zmodo Nest Eufy Nutone Ring Doorbell Hardwired Door Chime Power Supply Adapter Door-Bell 120v-to-16v Replacement, UL - - Amazon.com
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: Amazon.com: Tools & Home Improvement
Amazon.com: PWS-1650 16.5V AC 50VA Class II Power Supply AC Adapter UL 16V Transformer Plug with terminals : Industrial & Scientific
Doorbell Transformer 16VAC 30 VA AC Plug in Adapter with PTC Fuse Compatible with Ring Nest Doorbell UL Listed - - Amazon.com
Amazon.com: MGT-1650 Class II AC Power Supply (16.5VAC, 50VA)
Control Transformer, 50VA, 208VAC: Amazon.com: Industrial & Scientific