Stand alone smoke detector model GS-506 co-detector

Stand alone smoke detector model GS-506

Obviously, having a fire alarm system ensures the safety of a building much more than stand alone smoke detectors. Howev
Carbon monoxide gas detector with LCD model GS-828 co-detector

Carbon monoxide gas detector with LCD model GS-828

Carbon monoxide gas is an odorless, colorless, tasteless and highly toxic gas caused by the incomplete burning of fossil