Wheelock MB-G10-24-R Category : Wheelock I’m missing this unit’s label, so that model number is only a guess. It’s probably right though.
Amseco BZ-54VT+RSD-24L Category : AmsecoThat rubber band is holding the strobe to the unit since there are no screws keeping it secure.
GE 521BXT Category : GEI think that this smoke detector might be intended for use in security systems.