Simplex 2901-9838 Same idea as the other 2901-9838 spare cover that I own. Brand SimplexModel 2901-9838Manufacturer FaradayType Alarm Cover
Wheelock 7002T-24 Category : WheelockEach 7002T-24 has a somewhat different pitch, so I’ve kept several that sound different from each other.
Amseco BZ-54VT+RSD-24L Category : AmsecoThat rubber band is holding the strobe to the unit since there are no screws keeping it secure.
FCI S241575-FC Category : FCIUnlike my other FCI-rebranded System Sensor SpectrAlert Classic, this one does not have an FCI logo on the front.