EST 792-7A-006 This is a very unique looking horn/strobe. Brand EST/EdwardsModel 792-7A-005Manufacturer ESTType Alarm (Horn/Strobe)
System Sensor CO1224T Category : System SensorThis is a Carbon Monoxide detector which can run off of a “normal” voltage of 12/24VDC.
RSG RMS-1T Category : RSGEither this is an early generation RSG T-Bar or some unique variant of the more common RSG RJRMS-1T-KL.
Honeywell HFS-P Category : HoneywellOddly enough, the model number on this particular smoke doesn’t fit the typical pattern for Honeywell devices.