Faraday 6234-E Category : Faraday I believe the “E” appendage on the end of the model number means it is a sync-strobe. Brand FaradayModel 6234-EManufacturer SiemensType Alarm (Horn/Strobe)
Simplex 4904-9053 Category : SimplexI accidentally bought this particular unit not realizing I already had one. Oh well, happens.
GE 521BXT Category : GEI think that this smoke detector might be intended for use in security systems.
