Hey @ali.b. After checking [the chime compatibly list](https://support.ring.com/hc/en-us/articles/360044683012-Ring-Video-Doorbell-3-Chime-Kit-Compatibility-List) and seeing that your chime kit does not show up on the list of compatible or incompatible devices, I investigated a little deeper into this by checking out our installation guide [here](https://support.ring.com/hc/en-us/articles/360038902531-How-to-Physically-Install-Your-Ring-Video-Doorbell-3-with-an-Existing-Doorbell), which has a video of how to install the Doorbell with an existing chime kit. Although, I was unable to tell - do you have the two wires that come out, like in the video, to connect to the Ring Video Doorbell 3? It does not look like you do, so I have a feeling that this chime kit may not be compatible.