This First Alert 10-Year Sealed Tamper Resistant Ionization Smoke Alarm features a long-life 3V lithium battery that effectively provides a full 10 years of protection, without requiring any battery change. A single test/silence button lets you quickly mute nuisance alarms from cooking smoke or shower steam. This smoke and fire alarm also includes an easy mounting bracket and alarm end-of-life indicator.

• Help keep your family safe with this battery-operated smoke alarm; the 10-year lithium-ion battery offers continuous power for the life of the alarm and provides continued monitoring even if there's a power failure
• Alarm features an ionization sensor for smoke detection, which is effective in recognizing smoke from flaming fires such as paper and grease fires
• Battery-operated unit provides continuous monitoring even if there's a power failure: Plus, it's easy to install
• Alarm also features loud 85-decibel alarm, easy mounting bracket, a single test, silence button, and an end-of-life signal so you know when to replace the unit
• To ensure complete protection make sure to place one on each level of your home and in each bedroom
• Rigorously tested to meet UL standards