Simplex 4903-9168 This is a Speaker/Strobe. The strobe’s rating is 15 cd. Brand SimplexModel 4903-9168Manufacturer SimplexType Alarm (Speaker/Strobe)
Simplex 2904-9102 Category : SimplexI had to take a guess as to what this ceiling-mount light’s model number is, so 2904-9201 may not be...
System Sensor SP1W2475ADA Category : System SensorThe strobe portion can detach from the speaker body.