Simplex 4903-9101 Category : Simplex The only difference between this and my other Simplex 4903-9101 is that this strobe is meant to be on the bottom rather than on the top. Brand SimplexModel 4903-9101Manufacturer SimplexType Alarm (Strobe)
System Sensor CH24MC Category : System SensorThis alarm just looks like a slightly smaller version of the SpectrAlert Classic speaker/strobe.
