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Package Quantity:1 The Kidde 900-0120 Is An Ac Wire-In Carbon Monoxide Alarm That Warns You And Your Family Of Dangerous Carbon Monoxide Levels. It Includes Multiple Contractor Friendly Features To Ensure Easy Installation And Minimal Troubleshooting. This Alarm Interconnects With Up To 24 Kidde Devices (Of Which 18 Can Be Initiation) Including Smoke Alarms, Co Alarms And Heat Alarms On One Wiring Network. The 900-0120 Includes A 9V Battery Backup Along With A 5-Year Limited Warranty. Battery Pull Tab Made in: United States Dimensions: 2.4 X 6 X 5.9Brand: Kidde Item Weight: 0.93includes: Unit Instruction Guide Kidde’s KN-COB-IC hardwire carbon monoxide interconnectable alarm with battery backup helps to provide your home with comprehensive protection against the dangerous threat posed by the odorless and colorless gas. With an increasing number of state and local governments passing legislation requiring CO detectors in homes, it’s never been a better time to safeguard your family against carbon monoxide exposure.KN-COB-IC HardwireInterconnectable CO AlarmWith Battery BackupAt a Glance:Adjustable mounting bracket allows for fast installation and perfect alignmentTamper- resistant locking feature deters battery and alarm theftAlkaline battery backup provides continuous protection in case of power failureDimensions: 5.75-inch diameter and 1.8-inch depth; weighs 1 poundFive-year limited warrantyKidde's KN-COB-IC hardwire carbon monoxide alarm with battery backup is interconnectable with 23 other devices for comprehensive coverage. View largerFeaturesThe KN-COB-IC is an essential device to help warn you and your family of dangerous carbon monoxide levels in your home. This alarm measures the exposure to carbon monoxide over time; it is designed to sound at 85 decibels at 10 feet when it detects 70 ppm (parts per million) of CO for 60 to 240 minutes, 150 ppm for 10 to 50 minutes, or 400 ppm for 4 to 15 minutes. The added benefit of being able to interconnect this unit with up to 23 other Kidde devices—such as other CO alarms, smoke detectors, and heat sensors—all on one wiring network delivers extensive protection against fire and carbon monoxide (as well as peace of mind). The 9-volt battery backup provides continuous security if the power goes out. An LED lighting system on the unit signals power levels and sourcing: The green LED is steadily on when AC power is present and will flash every 7 seconds when in battery-only mode; the red LED will flash in unison with the sounder pattern for both a smoke or CO incident, and it will flash once per 30 seconds if the alarm needs service or be steadily on if the alarm is in error mode; and the amber LED will illuminate if the unit is the originating alarm in a CO incident. This device has an expected 7-year lifespan and comes equipped with a 5-year manufacturer’s limited warranty.What's in the BoxOne Kidde KN-COB-IC hardwire carbon monoxide interconnectable alarm with battery backup.The KN-COB-IC's many user-friendly features make it easy to install and maintain. (Click to enlarge) See all Product description