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BRK FIRST ALERT 9120B HARDWIRED IONIZATION SMOKE ALARM WITH BATTERY BACKUP | 12-PACK CASE |

Case of twelve BRK First Alert 9120B smoke alarms. 120VAC hardwired with 9V battery backup and an ionization sensor tuned for fast-flaming fires. Interconnects with up to twelve compatible smoke alarms plus six accessory devices such as horns and relays. Gasket-less mounting base, tamper-resistant locking pins, single-button test and silence, and a latching indicator that identifies which unit tripped.