Quantity   Component name
1 × First Alert 3120B AC Powered Photo and Ion Smoke Alarm https://www.amazon.com/dp/B00O8MVW44/
1 × First Alert RM4 Accessory Relay https://www.amazon.com/gp/product/B0039PF21U/
1 × 12v DPDT Latching Relay module https://www.amazon.com/gp/product/B00M91QO94/
1 × IoT AC Relay https://www.amazon.com/gp/product/B00WV7GMA2