2-IN-1 DETECTION: Alerts you to both smoke and carbon monoxide (CO) using a single detector..HARDWIRED and 10-YEAR BATTERY BACKUP: Operates on 120V AC wiring (installed in the ceiling). No battery changes for 10 years and saves up to 40 Dollar over the life of the detector..ENHANCED SENSING TECHNOLOGY: Reduces false smoke alarms often caused by cooking. Comprehensively tested to meet the latest UL standards, meets UL 217 9th Edition, UL 2034 4th Edition, and FCC standards..INTERCONNECT CAPABILITY: When one alarm sounds, they all sound, so you can get out faster. (Different models offer different interconnection options and requirements. See User Guide for more info.).SELF-TESTING ALARM: Internal components ensure alarm is always operating as expected. Not a substitute for a manual push test, perform a button test once per week to verify alarm operation..3 LED NOTIFICATIONS: LED lights indicate alarm status, green - normal operation, amber - operating error, red - smoke or carbon monoxide detected and a loud 85-decibel alarm will sound..TEST and HUSH BUTTON: Makes it easy to test the 5-inch combination detector and silence false alarms, should they occur..10-YEAR WARRANTY: Begins when alarm is powered on. If that date is unknown, it should be assumed that alarms should be replaced. (10-yr limited warranty on alarm, not a battery performance claim.)
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