The Kidde Battery Powered Combination Smoke and Carbon Monoxide Detector with Voice Alerts， model 900-CUDR-V， is an alarm combo that operates on 2 AA batteries (included). Battery-operated smoke detectors protect during power failures for extra peace of mind. If the smoke and carbon monoxide alarm detects smoke， fire， or carbon monoxide， an 85-decible alarm and voice alert will sound stating， Fire. or Warning: Carbon Monoxide The combination smoke and carbon monoxide detector also provides a voice alert of Low Battery when the battery on the unit needs to be replaced. The Kidde Smoke and Carbon Monoxide alarm uses photoelectric sensors that detect visible fire particles associated with slow smoldering fires， as well as an electrochemical carbon monoxide sensor， which offers highly accurate readings of CO. Carbon monoxide alarms help protect your family from the dangers of carbon monoxide - a poisonous， odorless gas. The alarm will also begin to chirp when the battery is nearing the end of its life and needs to be replaced. When a nuisance or false alarm sounds from routine cooking or shower steam， the Hush feature temporarily silences the Kidde combination smoke and carbon monoxide detector. Install a smoke detector and carbon monoxide detector on each level of your home， in hallways and inside each bedroom. UL Certified with a 10-year limited warranty. Meets requirements of UL 2034， UL217， NFPA72， NFPA 101， FHA， and HUD.

2 -in-1 detection - smoke and carbon monoxide detector combo alerts you to both smoke and fire events as well as poisonous， CO gas in a single device

Voice alarm - an 85 dB alarm will sounds and announce the hazard type: fire when a smoke or fire hazard is detected， warning carbon monoxide when a CO hazard is detected， or low battery when the batteries need to be replaced

Easy install mounting bracket (included) for quick installation in 4 orientations

Self-testing - smoke and carbon monoxide detector uses internal， self-testing components that are always checking to ensure the device is operating as expected (not a substitute for weekly manual testing)

Photoelectric smoke sensor detects visible fire particles associate with slow， smoldering fires sooner than an ionization sensor

Electrochemical sensor detects carbon monoxide and remains stable during humidity changes and unstable temperatures

2-AA alkaline batteries power the detector

1-touch button activates the hush feature to temporarily silence nuisance alarms， tests the detector's electronics and verifies proper operation and silences low battery chirp for up to 24-hours， maximum of 7-days

End of life chirp alerts user to replace the smoke detector-carbon monoxide detector combo after 10-years of operation

85 dB alarm will sound when the smoke and CO alarm senses a smoke or carbon monoxide hazard

LED warning indicators alert you to various status: green equal normal operation， amber equal operating error， and red equal smoke， fire or carbon monoxide event

UL certified with a 10-year limited warranty

UL/CSFM ref Kidde part KN-COPE-D (previous UL# CP9000)

UL/CSFM Ref. Kidde Part KN-COPE-D (Previous UL# CP9000)