Simplex 4901-9822 This is an electronic horn, not an electromechanical horn or a speaker. Brand SimplexModel 4091-9822Manufacturer SimplexType Alarm (Horn)
Edwards 270-GAO Category : EST/EdwardsThis is the original version of the 270-GAO. It is essentially the same as the newer version of the EST...
Simplex 4903-9101 Category : SimplexSince this is a ceiling-mount unit, it’s model number is probably different from 4903-9101, but I couldn’t figure out what...