A conventional doorbell has wires that connect the chimes or bell to the power source and that run to the button, which acts as a switch.
Replace a door bell with a door chime by choosing this IQ America Multi-Voltage Wired Doorbell Transformer.
Run your door bell or door chimes from mains electricity by installing this affordably priced Everyday Door Bell Transformer.
Doorbell Transformer, Golf Ball, Michael O'keefe, Wiffle Ball
Unusual Cera BT Bakelite & Brass Electric Sleigh Doorbell + Transformer (victorian, butlers maid) by DragonQuarryAntiques on Etsy