Will a Doorbell Extender Work With My Doorbell?
Extenders work with standard wired chimes that play a ding-dong sound. They do not work with video doorbells, intercoms or alarm systems.
Updated: October 15, 2026Original publish date: October 15, 2026
A doorbell extender works if you have a standard wired doorbell chime, the kind that plays a "ding-dong" for the front door and often a "dong" for the back door.
Voltage
- ERA-EXTX (in the ERA-EXKIT): works with 5V-28V AC/DC wired doorbells.
- LRA-EXTX (in the LRA-EX1000 and LRA-EX1000S): works with 9-18V AC wired chimes.
Front and back doors
Both transmitters handle two doors wired to the same chime. You can set one melody for the front door and another for the back, so you know which door it is. If your chime is wired for the front door only, that works too.
What extenders do not work with
- Video doorbells, including Ring.
- Intercom systems.
- Doorbells that are part of an alarm system.
If you have one of these, an extender is not the answer. A wireless doorbell kit with its own button and receivers is the usual alternative.
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Related FAQ categories
What Does a Doorbell Extender Do?A doorbell extender wires into your existing wired chime and sends a signal to wireless receivers in other rooms, so you can hear the doorbell anywhere.How Do I Install a Doorbell Extender Transmitter?Connect the extender's three wires to the Front, Back and Trans screws inside your wired chime, mount the transmitter, then pair it.Can I Add More Receivers or a Strobe to a Doorbell Extender?Yes. ERA and LRA extenders work with as many receivers as you need, and the plug-in receivers can flash a strobe with or without sound.ERA or LRA Doorbell Extender: Which Should I Choose?ERA extenders reach up to 4,000 ft and work with 5V-28V chimes. LRA extenders reach up to 1,000 ft and work with 9-18V AC chimes.What Battery Does a Doorbell Extender Transmitter Use?ERA and LRA extender transmitters each use one CR123A lithium battery, included, which lasts years. Plug-in receivers need no battery.