Kidde Optical Smoke Alarm is compact and simple smoke alarm with a non-replaceable, sealed-in lithium battery for 10 years of continuous protection, meaning the user never needs to change the battery for the full duration of the alarm’s life. This compact

• · 10-year long life operation
• · Sealed in battery
• · End of life notification alerts
• · Ramp-up horn
• · Combined Test/Hush button