Experience unparalleled protection with the USI Hardwired Combo Smoke, Fire, and Carbon Monoxide Alarm with 10-Year Battery Backup. Equipped with Sensing Plus Multi-Criteria Detection, this advanced photoelectric alarm accurately identifies both slow-burning and fast-flaming fires, ensuring early detection and rapid response. An included electrochemical sensor detects carbon monoxide, for a single compact home safety solution. This hardwired alarm sends alerts to compatible hardwired alarms in the home for comprehensive coverage. The 10-Year sealed backup battery ensures continuous protection during power failures and replaces annoying low-battery chirps with a single end-of-life alert after 10 years to remind you it's time to replace your smoke alarm. This alarm features a voice alarm, offering clear guidance differentiating between fire and CO alerts and replacement reminders. Advanced technology reduces nuisance alarms, minimizing disruptions from activities like cooking. Should you experience a false ala