High Compatibility - This 24V transformer is perfect for a variety of devices for Nest, for Ecobee, and for Honeywell smart thermostats, as well as Ring, Nest Skybell, and other video doorbells. It ensures your devices always have the power they need for optimal performance. Certified Safety & Performance - With an input of 120V 50/60HZ and an output of 24V 40VA, it provides reliable and continuous power, making it a safe choice for your home's wired systems. Power Multiple Devices - Ideal for upgrading underpowered transformers, our 24V AC Transformer can handle multiple thermostats or doorbells simultaneously. It's the perfect replacement for old transformers, ensuring all your devices function correctly without interruption. Designed for quick replacement and setup, it can be securely mounted in any suitable electrical box within your home. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Black & Silver Material:Metal+Plastic Package Contents: 1 * Video Doorbell Transformer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.