Wheelock MT4-115-R Category : Wheelock This MT runs off of 115 VAC. It has the older MT screw holes. Brand WheelockModel MT4-115-RManufacturer WheelockType Alarm (Horn)
Wheelock ET-1080 Category : WheelockThe white and red versions of this speaker both have the same model number.
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...
