Wheelock ZRS-MCW Category : Wheelock This alarm is similar to the Siemems ZH-MC-W except it is red and a remote strobe. Brand WheelockModel ZRS-MCWManufacturer WheelockType Alarm (Remote Strobe, 2 Wire)
Space Age AV32+2DCD Category : Space Age ElectronicsThat is an electromechanical horn on the rear of the strobe plate.
Honeywell SC809A1019 Category : HoneywellThis type of speaker has been re-branded by many other companies, such as Simplex.
