Is the Ring Video Doorbell Pro COMPATIBLE with an EXTEND-A-CHIME wired to your mechanical door chime? EXEND-A-CHIME connects to your door chime and wireless sounds additional chimes throughout your home. Both the front door and back door doorbell buttons sound their unique mechancal chime sound at each remote chime. I have 3 Ring Chimes (basement, 2nd floor, master bedroom) and 2 Ring Chime Pro’s (range extender for outdoor cameras), but they do not distinguish which doorbell was activated. Extend-A-Chime works with all low- voltage mechanical door chimes.
Great question @DavidB262! For the Extend-A-Chime devices to works best, they are intended to be wired into your existing mechanical chime kit. This means compatibility between it and the Pro does not matter too much, as long as your Pro is compatible with the existing mechanical chime kit of course.
The only concern here would be resistance and power draw. As you stated this component uses low power, it should not have any affect on your setup and should work as expected when wired into the chime kit. I hope this helps!