Simplex 636-820 Category : Simplex This is the Simplex 4010 user interface which was taken out of a broken 4010. Brand SimplexModel 636-820Manufacturer SimplexType Component
System Sensor SP1W2475ADA Category : System SensorThe strobe portion can detach from the speaker body.
GE 521BXT Category : GEI think that this smoke detector might be intended for use in security systems.
