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First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup,
Introducing the revolutionary BRK 9120 series smoke alarms which have been redesigned from the ground up. They install faster, perform better, and are even smarter than before. All of these improvements help reduce nuisance alarms and save you time and money. BRK Electronics smoke alarms are designed to be easy to install, easy to maintain, and quality-engineered for years of virtually maintenance-free service. The 9120B AC-powered smoke alarm with battery backup includes these features ionization sensor which helps detect fast flaming fires that consume combustible materials rapidly. AC inter-connectable (with maximum 18 compatible devices). the alarm can be interconnected with up to 12 other compatible smoke alarms and six compatible devices like bells,

Price is $115.00
Price: $115.26