Kidde Nighthawk Carbon Monoxide Detector

CO detector with digital display & alert modes; 85 decibel alarm alerts of fire Electrochemical sensor technology - detects carbon monoxide & other forms of combustible gas such as propane & natural gas Easy to install - combo smoke and gas alarm is powered by a 120VAC wall outlet with 9V battery backup Low battery warning feature indicates when the battery needs replacement UL Certified, 10-year limited warranty Two alarms in one detects carbon monoxide and explosive gas Three convenient mounting options Digital display and peak level button displays the peak CO level recorded by the alarm since it was last reset Battery backup 9 volt battery included Kiddes carbon monoxide alarms meet the requirements of Underwriters Laboratories (UL), an independent facility that tests products for compliance with widely-accepted safety standards Brand new, still in sealed packaging.