If you have a Carlon, Thomas & Betts, Lamson & Sessions, or Dimango Wireless Door Chime. 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purchasing any wireless doorbell transmitter, you need to check the QC numbers to make sure your receiver is not “outdated” and will be compatible with the buttons.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 2000, then IT WILL NOT be compatible with any wireless Carlon products featured on this website.
You should see a small white sticker on the back of the Carlon/Dimango product. On this sticker, you will see QC with a four-digit code right under it.
There will be two 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.
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.