First Alert™ Photoelectric Smoke Alarm

• Photoelectric smoke alarm with a 10-year sealed lithium battery • You won't need to worry about battery changes or nuisance beeps due to low batteries, for the entire life of the detector • Low profile, slim design • 85 dB • Easy installation • Alarm status LED indicator • Single test/silence button • End of life warning notifies you when the alarm needs to be replaced • Includes easy twist mount and hardware