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)
Cerberus Pyrotronics S17-FS Category : Cerberus PyrotronicsThis is an interesting strobe because it is single gang (half the width of a normal alarm).
Simplex 2901-9833 Category : SimplexI have several of these horns because I’ve had several of them unexpectedly break on me.
