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  Home > Extend-A-Chime > Compatibility Notice

Lamson Home Products has verified that the following WIRED models are NOT compatible with our Carlon Brand Door Bells. These units are the "Musical Record-A-Tune" which requires a micro processor within the circuit board which makes the "Extend-A-Units" continuously ring. Therefore, they are not compatible with RC3500D/RC3030D/RC3200D.
  • DH840E/SS840E
  • DH852E/DH853E
  • SS852E/SS853E
  • DH845E/SS845E
  • SS846E/SS856E
We also found that some of the Broan Product Line of WIRED doorbells are NOT compatible either.
  • RC305
  • RC306


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