Newhouse Hardware 40TR 24-Volt 40vA Wired Door Bell Transformer for Powering...
Compatible with Ring Video Doorbell Pro, Nest Hello, Nest thermostats, Zmodo Smart Greet Wi-Fi Doorbell, Sky Bell Doorbell, and more. Compatible with Ring Pro and ring doorbells, Wi-Fi and other smart thermostats like Nest and Eco bee and more.