Pretty straight-forward things doorbells are, a button completes a low-voltage circuit and energizes a solenoid, it in turn fires a steel rod into one or more chimes.

Absolutely anything that completes the circuit will work, and for as many doorbells as the cumulative current carrying capacity of the contacts will take.

I ran a pair of relays to the doorbell at my house then hooked them into the light switch for the basement and shop. If the lights are on in either (or both) the shop or basement the bells there rings as well as the main set.

Of course with a pair of Jack Russells Terriers around we hardly need a doorbell to let us know someone is at the door.

Best of luck.

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