Experience unparalleled protection with the USI Hardwired Smoke 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. This hardwired alarm connects to other hardwired alarms in the home to provide comprehensive coverage throughout the space. The 10-Year sealed backup battery ensures continuous protection 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 alerts and replacement reminders. Advanced technology reduces nuisance alarms, minimizing disruptions from activities like cooking. Should you experience a false alarm, easily silence it with the test/silence button. With UL certification, you can trust in the reliability and performance of USI Hardwired Smoke Alarms. Invest in peace of mind and protect your loved ones with this advanced home safety solution. With over 50-years of experience as a leader in home safety, USI provides reliable, long-lasting protection for your home.. Alarm Sensor Type: Photoelectric. Alarm/Detector Features: 10-Year Battery,Battery Back-Up,Hush Button,Light Indicator,Tamper Resistant. Alert Type: Siren,Voice. Commercial/Residential: Home. Connector/Contact Type: 3-Wire. Fixed or portable: Fixed. Included: Battery Back-Up,Installation Kit,Mounting Hardware,Owner's Manual. Pack Size: 1. Power Source: Hardwired. Returnable: 90-Day. Voltage (V): 120 V. Certifications and Listings: ETL Listed. Product Depth (in.): 1.7 in. Product Height (in.): 6.1 in. Product Width (in.): 6.1 in. Alarm Sensor Type: Photoelectric. Features: 10-Year Battery. Features: Battery Back-Up. Pack Size: 1. Features: Hush Button. Alert Type: Voice. Features: Light Indicator. Alert Type: Siren