Upgrade your home with Broan-NuTone’s Doorbell Transformer! This high-quality doorbell transformer features an easy-to-install lock-mount or wall-mount that can reduce installation time by 25%. An additional unique feature is the thermal cut-off switch designed to shut off the doorbell system in the event of excessive temperature. The quick-install transformers are built to last for fewer call backs. One 16-volt, 30VA transformer powerful enough for up to three doorbells, saving installation time! This transformer works in any standard, single-gang junction box for your convenience. It is cULus Listed for safety, ensuring you have a reliable transformer that will past inspection and provide high-quality use for years to come. Broan-NuTone’s Doorbell Transformer measures 2.54″ x 2.19″ x 2.65″ and has a one-year limited warranty.