Siemens U-MHU-MCS I believe that this alarm is capable of doing multiple tones. Brand SiemensModel U-MHU-MCSManufacturer SiemensType Alarm (Horn/Strobe)
Space Age AV32 Category : Space Age ElectronicsI have no clue why a blue-tinted strobe would be used for fire protection/life safety.
Honeywell SC809A1019 Category : HoneywellThis type of speaker has been re-branded by many other companies, such as Simplex.