SL-122 Doorbell Transformer. To control voltage to hardwired door chimes, look to the Heath Zenith Wired Door Chime Transformer. This lock-nut unit reduces voltage from 120 VAC to 10 - 16 VAC.
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, 10-volt ampere). Remember to turn off the power at the fuse or junction box before installing.--Josh Dettweiler
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