Each of the four (4) zones on the ERA-DCRX receiver has a live 12V DC output.
These outputs enable you to connect an external device to the output to activate when that zone is triggered.
For example, let's say you operated a loud workshop and when loud machinery is turned on, it's hard to hear the receiver. The live 12V DC outputs provides a couple of options.
One option is using a 12V DC LED Strobe Light and connect it to the output for a zone. When a visitor arrives and presses the compatible push button, the ERA-UTX, not only does the paired receiver(s) play the chosen chime sound, the bright strobe light will provide a good visual indicator.
Safeguard Supply provides packaged kits that come with a strobe light (4 colors to choose from) along with "bellwire" (a bundle of 18AWG wire), as well as the push button and receiver in the WDK-ERA-STROBE.
Another option would be to connect a loud 105 dB rated siren to the 12V DC output. When a visitor arrives, the chime plays, and the siren plays a very loud sound to alert you that a visitor has arrived.
Like the WDK-ERA-KIT, Safeguard Supply also has the WDK-ERA-KIT with options like a FIREBELL, SIREN, and Chrome Enclosed Buzzer to choose from.
Each zone has its own 12 V DC output. That means you can mix and match 12V accessories, like a different strobe color for each zone, to help you better determine which push button or magnetic entrance alert was triggered.