Kidde is a carbon monoxide alarm that contains the right functionality to protect homeowners before hazards have the chance to rear their hot heads. These alarms provide the warnings of any presence of CO, usually before a healthy adult would experience the symptoms. Because carbon monoxide is a cumulative poison, the Kidde KN-COB-B-LPM has a time-weighted alarm-the higher the level of CO present, the sooner the alarm will be triggered. Battery life saver carbon monoxide alarm with a new slim design suitable for any living area Respected name in fire safety for commercial and residential applications Permanent sensor 85 DB alarm One 9-volt and three AA batteries included; provides protection during power outages Protects your family against two potential home dangers, smoke and carbon monoxide Test/reset buttons conveniently located on CO alarm UL listed 6 pack.