It uses a simple twist-on ceiling mount and is powered by 3 AA batteries. It features a central LCD that shows CO levels in PPM (000–999) and smoke concentration percentages.
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: The U.S. Consumer Product Safety Commission (CPSC) has issued a urgent warning for consumers to immediately stop using and dispose of JKD-512COM combination smoke and carbon monoxide detectors. These units have been found to fail to alert consumers to hazardous levels of fire or carbon monoxide, posing a serious risk of injury or death. jkd-512com user manual