Compatible With 120V-240V to 24V 40VA Transformer Compatible With Nest, Compatible With Ecobee, Compatible With Sensi, Compatible With Honeywell Thermostat, Compatible With Nest Hello Doorbell and All Versions of Ring Doorbell Power Supply Adapter Door-Bell 120v-240v-to-24v Replacement<p>Disclaimer:<p>This is not an Original Equipment Manufacturer (OEM) product, HQRP branded product is a replacement. All brand names and logos are registered trademarks of their respective owners. Any use of the brand names or model designations for this product are made solely for purposes of demonstrating compatibility.