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)
Ademco 532 Category : AdemcoThe only place I’ve ever seen an Ademco re-branded BG-10 has been on this particular unit.