Simplex 4903-9403 Category : Simplex The strobe on this alarm model isn’t directly connected to the alarm, oddly enough. Brand SimplexModel 4903-9403Manufacturer SimplexType Alarm (Horn/Strobe, 4-wire)
Wheelock HSR Category : WheelockThis is from the Exceeder series. The only difference between this and my Wheelock HSW is the color.
Simplex GX90-4R Category : SimplexThe Simplex label on this alarm can be peeled back to reveal the Gentex logo.
