Silent Knight SD505-APS This smoke detector is conventional. Brand Silent KnightModel SD505-APSManufacturer Silent KnightType Smoke Detector
Simplex 2098-9806 Category : SimplexThere is no difference between this unit and my other Simplex 2098-9806.
Simplex 4904-9101 Category : SimplexThis is the same strobe that is found on the Simplex 4903-9101 strobe plates.
