Will a wired video doorbell work with my existing chime and transformer?

Most wired doorbells need a 16–24V AC transformer, which is standard in newer U.S. homes but not always present in older houses or apartments. Compatibility with mechanical chimes is a known sticking point — community discussion specifically flags the newest Ring Wired Doorbell Pro 4K as not working with mechanical chimes out of the box. Always check the manufacturer's transformer voltage spec and chime compatibility list before buying.