| BRK RM4 Smart Relay,Wire-In,AC Power Relay Wire-In, Includes (1) Set of Form C Contacts, Power Source Hardwired, Product Type Smart Relay, For Use With BRK and First Alert Smoke, Heat and Carbon Monoxide Alarms, Manufacturer Warranty Length 10 yr Limited, Maximum Operating Temperature 100... more | | $21.29 go to store |