Hardwired Smoke and Carbon Monoxide Alarm with Battery Backup

Keep your family safe with this hardwired smoke and carbon monoxide detector, powered by a 120 V electrical connection with a 9 V battery backup for continuous protection during outages. It features an electrochemical CO sensor and an ionization smoke sensor for early detection of fast-flaming fires. This unit can be interconnected with up to 12 smoke alarms and 6 combination alarms so all will sound if one detects danger. Indicator lights on the unit show whether smoke or CO is present, and an 85-decibel siren delivers a loud, clear alert. Includes a single test/silence button, side-load battery compartment, tamper-resistant locking brackets, and universal mounting system. A 10-year end-of-life alert notifies when the unit needs replacement.