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The Kidde KN-COSM B battery operated carbon monoxide and smoke detectors combines two important security features in one unit. This alarm includes a voice warning system that announces "Fire, Carbon Monoxide, Low Battery or Smart Hush Activation." The voice alarm eliminates any confusion and clearly warns you and your family to the danger of smoke or carbon monoxide, or if the battery must be replaced. The device runs on three AA batteries, protect your family and yourself during a power failure alarm uses ionization sensing technology smoke detector. The identification of ionization may detect invisible fire particles (associated with flame fires) before the photodetector. Photoelectric sensing alarms in May
