Review on 🚀 Enhanced First Alert RM4 Intelligent Relay for Advanced Connectivity by Bishop Terry

Easy to connect and works as intended. I used it to connect my interconnected BRK/First Alert smoke and carbon monoxide alarms to SmartThings, one end of which connected to the smoke/carbon monoxide alarms and the other end to a Z-Wave door and window sensor with a Nexia RS100 was connected. I then added a custom device type in SmartThings to make the contact sensor appear as a smoke/carbon monoxide alarm. It fits well in the mounting box with a contact sensor.