Wheelock MB-G10-24-R I’m missing this unit’s label, so that model number is only a guess. It’s probably right though. Brand Wheelock
GE 521BXT Category : GEI think that this smoke detector might be intended for use in security systems.
STI SS-2000F Category : OtherCan’t remember where exactly I put the key for this unit. It can still open with an allen wrench, but...