and a doorbell transformer that converts your home's 120-volt (V) power to the lower voltage power requirements (usually 16 V) used by the system. You’ll be working with the exterior button first.

Step 2: Find and Inspect Your Doorbell Transformer Use a multimeter set to "AC volts" (not "DC volts") and connect it to the ...

this doorbell lets you see everything from a delivery driver’s face to the package at their feet. You can either hardwire it to an 8-24V transformer for continuous trickle charging or use it ...