24V 40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Doorbell and All Versions of Ring Doorbell (Style 1)

No more underpower thermostat/doorbell transformer: This 40 v transformer can power up multiple thermostat and doorbell in your home, replaces and upgrades underpowered transformer, it can offer plenty of power for single or multiple thermostats and doorbells at the same. Wide compatibility: This 24v/ 40va transformer compatible with Nest, Ecobee, Honeywell, Sensi smart thermostats; Fits for Ring Video Doorbell, Ring Video Doorbell 2, Ring Video Doorbell Pro, Nest Skybell doorbell, etc.; Also works with other devices that require constant 24 volt power for operation. UL certified and safe use: This 24v ac transformer has passed UL certification, please rest assured to use. Easy installation: Screw down or threaded clamp to electrical box, simple to wire up. Specification: Input: 120 V/ AC, 60 HZ Output: 24 V/ 40 VA Note: All the thermostat's brands and doorbell's brand names mentioned above is only for demonstrating compatibility.