The NuTone Broan C905 Doorbell / Door chime Transformer is a reliable electrical device that transforms 120V AC to 16V AC with a power rating of 10VA. This transformer is designed for use with doorbells and door chimes, providing a secondary voltage output that is suitable for these specific applications. With a turns ratio of 1:6, this transformer is efficient and effective in delivering the necessary power for your doorbell or door chime system.