Siemens U-MHST-MCS Category : Siemens I believe that this alarm has the ability to produce multiple tones. Brand SiemensModel U-MHST-MCSManufacturer SiemensType Alarm (Horn/Strobe)
Simplex 4904-9137 Category : SimplexThis is, in fact, a Simplex 4904-9137. It’s just missing its housing.
