Compatible with Thomas & Betts, Carlon models RC3030D, RC3730D, RC3190D, RC3250/RC8250, the Add On Door Chime allows you to hear the bell in any part of the house. Simply plug the doorbell into any 110V electrical outlet.

• Attractive, compact design leaves other outlet receptacle available
• 2 12" speaker provides excellent sound
• 32 selectable codes block interference from outside signals
• Select from 6 sound options
• Operating range: up to 150 ft.
• Two year warranty
• This will not work with model RC3730 or RC3733 only with works with the "D" version, see below for the non d version.