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. 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. Order in a standard package of six to help assist with your planning and remain fiscally responsible. Broan-NuTone’s Doorbell Transformer measures 2.25″ x 2.25″ x 3.7″, perfect for your home.