ERA-DCKIT-2 
If you have a Carlon, Thomas, and Betts, Lamson and Sessions, or Dimango Wireless Door Chime, click here to see compatible wireless transmitters. Before purchasing any wireless doorbell transmitter, you need to check the QC numbers to make sure your receiver is not “outdated” and will be compatible with the buttons. If any component in your current system is manufactured before the year 2000 then IT WILL NOT be compatible with any of the wireless Carlon products featured on this website.
Products manufactured by Carlon AFTER THE YEAR 2000 use a technology named Surface Wave Acoustic or SAW which increased connectivity and increased battery life. Although this improved the products it made products featuring this technology incompatible with those that did not. Locate the small sticker on the back of the receiver with the QC information.
There will be 2 sets of numbers. (xx-xx) The second set of numbers must be 00, 01, 02, 03, etc., or higher. If they are in the ’90s (99, 98, 97, etc), they are NOT compatible. Unfortunately, the receiver and button would both need to be replaced.