The Morris Products 78210 transformer accepts a 120 VAC input and produces a 24 VDC output for use with doorbells, buzzers, and chimes rated for 24 VDC and no more than 40 VA. It is thermally protected, and is a Class 2 energy-limiting type transformer, which means its current is self-limiting and does not need a fuse or breaker switch in its circuit. It has a screw-hole mounting feature, and it fits standard wiring knockout holes. This transformer is Underwriter's Laboratory (UL) listed and Canadian Standards Association (CSA) certified for quality assurance. It is suitable for a wide range of home or business applications with doorbells, buzzers and chimes rated for operation at 24 VDC and no more than 40 VA.

Morris Products manufactures electrical and lighting products such as meters and testers, tools, power connectors, and organizational devices. The company, founded in 1994, is headquartered in Queensboro, NY.