If I understand correctly, 'DC515XX' is not the name for a specific product, but for the Honeywell product series.

Yes, I connected it to mine because I needed two places to ring, one at the bottom and one at the top, so we can do it without any worries.

Thank you all very much. I have now found a solution that should work. According to the manufacturer, it should work.

I have a DC915XX door chime, which fits. Unfortunately, I don't know the difference to the 515XX

Hello everyone. I have connected it to "Honeywell DC313xx" and it works perfectly.
I cannot judge whether it is suitable for DC515XX.

I easily paired it with a "Honeywell Series 3 DC313S", as the products are very similar in type, I assume: YES.

I bought it and it worked for a few weeks and no more connection......

finally bought a product in China for less than CHF 20 and it still works