Smoke Alarm w/ Smart Hush

The innovative design of this KIDDE SMOKE ALARM WITH SMART HUSH is unlike any other... it automatically activates when attached to a mounting bracket! There are no pull tabs, no switches- everything's totally automatic. And, it chirps when it reaches its 10 year alarm life, letting you know its time for a new one. Plus, its self-sealed batteries mean 10 years of hassle-free operation and battery replacement costs. There's also a SMART HUSH feature that temporarily silences nuisance alarms and a four-mode flashing red LED indicator for standby, Alarm, Hush, and Memory Set.