Universal Compatibility: Designed to work seamlessly with leading video doorbells including Ring Video Doorbell versions (2020 release, 3/4/Plus, and Pro 1/2), as well as Nest, Eufy, Skybell, Arlo, and more. Converts 110/120V to 24V 500mA , ensuring reliable power for your smart doorbell. Plug-and-Play Installation: No tools or expertise required! Easily connect the 16.4FT adapter cable to your device for a hassle-free setup, saving you time and effort. Consistent and Reliable Power Supply: Doorbell power supply Delivers 24V and 12W of power, ensuring your smart devices run smoothly without interruptions, eliminating the need for frequent battery replacements. Durable and Safe Design: Doorbell transformer built with fire-resistant materials and high-quality components, offering long-lasting performance and peace of mind for your smart home setup. Extra-Long 16.4FT Cable: Enjoy flexible placement options with the extended cable length, allowing you to connect to distant power outlets indoors or outdoors with ease. 24V Doorbell Transformer