2 models · 2 options

SECRUI Add-On Receivers & Sensors

Parts, not kits. Each one pairs with the SECRUI receiver or button you already have.

The M520 Add-On Receiver. Plug it in on that floor, pair it with your button, and both chimes ring together.

The D017 Add-On Door Sensor. One receiver takes up to 40 of them, each with its own melody.

	SECRUI add-on	A second complete kit	Moving the receiver you have
What you buy	One receiver or one sensor	A button or sensor plus a receiver	Nothing
Rings together with your first kit	Yes, after pairing	Only after you pair the two	It is the same receiver
Covers two places at once	Yes	Yes	No
When it is the better choice	Not applicable	You need another button as well as another chime	You are only ever in one room at a time

1. Name the gap
A room that cannot hear is a receiver. A door nobody watches is a sensor.
2. Check the model
The D017 sensor pairs with M508 and M520 receivers. The add-on receiver pairs with SECRUI doorbell buttons.
3. Pair it once
Follow the pairing steps on the setup page.

The right add-on for the gap you have