FCI HSC An FCI-branded cover for the Simplex 2901-9838-equivalanet horn. Brand FCIModel HSCManufacturer FaradayType Alarm Cover
EST 882-2B Category : EST/EdwardsThis unit has an electronic horn rather than an electromechanical mechanism.
Honeywell HFS-P Category : HoneywellOddly enough, the model number on this particular smoke doesn’t fit the typical pattern for Honeywell devices.