FIRST ALERT 9120B Hardwired Smoke Detector with Battery Backup, 3-Pack

The BRK 9120 series smoke alarms have been redesigned from the ground up, offering revolutionary features. These alarms install faster, perform better, and are even smarter than before, helping to reduce nuisance alarms and save you time and money.

Designed to be easy to install, easy to maintain, and quality-engineered for years of virtually maintenance-free service, the BRK Electronics smoke alarms include an ionization sensor that helps detect fast flaming fires. The 120-Volt AC inter-connectable alarm (with a maximum of 18 compatible devices) can be interconnected with up to 12 other compatible smoke alarms and six compatible devices like bells, horns, repeaters, and door closers. If one unit triggers an alarm, all smoke alarms in the series will sound, and power indicators show which unit in the series initiated the alarm. The latching alarm indicator automatically identifies which unit initiated the alarm.

Smart technology is implemented to reduce nuisance alarms, and a 9-Volt battery backup provides peace of mind during power malfunctions. A single test/silence button silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality. The perfect mount system includes a gasketless base for easy installation and a new mounting bracket that keeps the alarm secure over a wide rotation range to allow for perfect alignment. Tamper-resistant mounting bracket locks and a dust cover to keep the unit clean during construction are also included.

Backed by a 10-year limited warranty, these alarms are designed for faster turnarounds on job sites, offering the most trusted alarms in home safety. Keep your family safe with this 3-pack of hardwired smoke alarms, as the battery backup ensures constant monitoring, even in the event of a power failure.

Equipped with an ionization sensor, these smoke alarms reliably detect smoke from fast flaming fires and alert you with an 85-decibel alarm. To ensure complete protection, it is recommended to place one alarm on each level of your home and in each bedroom. The alarms can be connected to other compatible BRK or First Alert smoke detectors, ensuring that all alarms will sound when smoke is detected.

Simple to use, with a single test/silence button and a side-load battery compartment, these alarms also feature tamper-resistant locking brackets and universal mounting brackets for easy installation. Rigorously tested to meet UL standards, these alarms are the most trusted brand in home safety since First Alert launched the first residential smoke alarm in 1958.

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