First Alert BRK RM4 Smart Relay for First Alert

Kidde SM120X Interconnect Accessories Smoke Relay Module

Z-Wave Plus Rare Earth Magnets Door & Window Sensor, White & Brown (DWZWAVE2.5-ECO)

Z-Wave Door and Window Sensor with Nexia, RS 100, Both White and Brown Cases Included

First Alert Smoke Detector, Photoelectric and Ionized Alarm | Hardwired with Battery Backup, BRK 3120B

Honeywell WAVE-2 Two Tone Siren

First Alert Hardwired Smoke Alarm with Photoelectric Sensor and Battery Backup, BRK 7010B

First Alert Hardwired Talking Photoelectric Smoke and Carbon Monoxide Detector, BRK SC7010BV

First Alert BRK 3120B-6 Hardwired Photoelectric and Ionization Smoke Alarm with Battery Backup, 6 Pack, White

First Alert BRK CO5120BN Hardwire Carbon Monoxide Alarm with Battery Backup

First Alert Smoke Detector Alarm | Hardwired with Backup Battery, BRK9120b6CP