Zooz 800 Series Z-Wave Long Range DC Signal Sensor ZEN55 | for Use with Analog Smoke & CO Detectors Only | Z-Wave Hub Required (Sold Separately)

https://a.co/d/06vFxnLn Literally takes seconds to install adapts to HA flawlessly. Much cheaper in the long run

ZOOZ ZEN55 DC Signal Sensor works great for me... I just wired into one of the detectors electrical boxes. All my detectors are wired together when the signal wire. https://a.co/d/0fCODhIj