FIRST ALERT BRK 9120B-3 Hardwired Smoke Alarm with Backup Battery, 3 Pack, White & SCO5CN Combination Smoke and Carbon Monoxide Detector, Battery Operated

• Keep your family safe with this 3 pack of hardwired smoke alarms. the battery backup means constant monitoring, even if there's a power failure Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm To ensure complete protection make sure to place one on each level of your home and in each bedroom Can connect to other compatible BRK or First Alert smoke detectors, to ensure all alarms will sound when smoke is detected Keep your family safe with this battery operated smoke and carbon monoxide alarm. Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure Features an electrochemical carbon monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning upon detection Battery operated unit installs quickly and easily without an electrician. Low battery signal mute, quiets low battery signal for up to 8 hours