Amseco MSB-10B-PV4 This bell is specifically meant to be used in a fire alarm system. Brand AmsecoModel MSB-10B-PV4Manufacturer UnknownType Alarm (Bell)
Potter SH-1224 Category : PotterThe appearance of this alarm is like a mix between a System Sensor SpectrAlert Advance and a Gentex Commander 3....
GE 521BXT Category : GEI think that this smoke detector might be intended for use in security systems.