24V transformer 24VAC 40VA AC Transformer PTC Fuse Led indicator 3 prong plugin 120vac to 24vac power adapter C Wire adapter Compatible with Ring Nest Doorbell Thermostats UL Certified

UNIVERSAL COMPATIBILITY: 24v transformer is compatible with Ring video doorbell, Ring video doorbell 2, ring video doorbell pro, Nest Skybell doorbell, Nest, Ecobee, Honeywell ,emerson Sensi smart thermostat, and other devices that require constant 24 volt power for operation SAFE AND STABLE : 24 volt transformer is UL-certified, offers reliable performance simple to wire up; ;Auto-resetting (PTC) fused secondary, LED power indicator 3 Terminal positive, negative& ground screw terminals for easy Installation of common / C-Wire Please note: the brand names above is only for demonstrating compatibility UL CERTIFIED AND EASY INSTALLATION: Trusted US Brand and UL Certified transformers to Eliminate Doorbell / thermostat under power, With this 24V 40VA plug in transformer, provide Constant power supply to smart products and devices and Save on battery cost Power Specification : class 2 transformer 24V 1660mA, 120v - 60hz