24V 40VA thermostat and doorbell transformer, compatible with all ring doorbell models

This 24-volt transformer is UL certified and offers reliable performance. Input: 120 VAC, 60 Hz; Output: 24 V / 40 VA. Easy to install: screw and threaded electrical box clamps. Powers thermostats and doorbells: replaces underpowered transformers. This 24V transformer is suitable for Honeywell and Sensi smart thermostats; Nest, Ecobee, and also compatible with Ring Video Doorbell, Ring Video Doorbell 2, Ring Video Doorbell Pro, Nest Skybell Doorbell, and other devices that require a constant 24-volt power supply for operation.