Heath Zenith 121AC Wired Door Chime Transformer Review

Use this lock-nut-type transformer to replace an existing transformer or to install a new low-voltage doorbell system. Works with 120-volt AC input (output is 16-volt AC, 15-volt ampere). (Remember to turn off the power at the fuse or junction box before installing.)--Josh Dettweiler

What's in the Box
Transformer