High Compatibility - This 24V transformer is compatible with a variety of devices including Nest, Ring, Skybell, and other smart thermostats and video doorbells. It ensures your devices receive consistent power for optimal performance. Certified Safety & Performance - With an input of 120V 50/60Hz and an output of 24V 40VA, this transformer delivers reliable and continuous power, making it a safe choice for your home's wired systems. Power Multiple Devices - Ideal for upgrading underpowered circuits, this 24V AC transformer can support multiple thermostats or doorbells simultaneously. It serves as a reliable replacement for older models, ensuring all connected devices operate without interruption. Designed for quick replacement and easy setup, it can be securely mounted in any standard electrical box in your home. Color: Black & Silver Material: Metal + Plastic Package Contents: 1 x Video Doorbell Transformer Note: Other products are not included. Note: Slight color variations due to lighting and display settings may occur. Measurement may vary by +/- 1-3 cm.