Simplex 4901-9811 Category : Simplex This particular alarm is actually capable of doing three different tones. Brand SimplexModel 4901-9811Manufacturer FaradayType Alarm (Horn)
GE 521BXT Category : GEI think that this smoke detector might be intended for use in security systems.
Gentex GEC24-15/75PWW Category : GentexThis Commander 2 could be used for a purpose other than fire protection due to its missing “Fire” labels.
