24V 40VA Thermostat Doorbell Transformer Compatible with Nest Honeywell Ecobee Sensi Thermostat Nest Hello Doorbell and All Versions of Ring Doorbell

If you notice a buzz or hum sound from your ring doorbell, it's likely due to the transformer needing more power. Get This transformer and be done!  24v 40va Thermostat/Doorbell Transformer Specification: Input voltage: 120 v AC, 60 Hz Output voltage: 24 v AC at 40 VA Dimension : 3.2 x 2.6 x 2 inch/ 8 x 6.5 x 5 cm (LWH) Wide Application for many doorbell transformers and thermostat: Doorbell Transformer - It's compatible with Ring Video Doorbell, Ring Video Doorbell 2, Ring Video Doorbell Pro, Zmodo Smart Greet Wi-Fi Video Doorbell and Nest Hello Doorbell, etc. Or any other devices that require constant 24V power for operation. Thermostat Transformer - A perfect device to operating Honeywell Smart WiFi Thermostat, Sensi Thermostat, Ecobee Thermostat, and Nest Thermostat. Convenience of Installation:  Turn off power before installation, screw down or threaded clamp to electrical box, safe handling. Pacakge Included: 1*24V 40VA Transformer, 1*Installation Guide. Note: This product is not a Ring doorbell product or thermostat product. All the thermostat's brands and doorbell's brand names mentioned above is only for demonstrating compatibility.