Cerberus Pyrotronics U-MHT-S17

I am not 100% sure of the differences between the U-MMT and the U-MHT since I could only find it’s manual in French, but I’m pretty sure the -MMT has multiple tones while the -MHT is just a classic horn.

Also in the collection
GE 521BXT

GE 521BXT

Category :
I think that this smoke detector might be intended for use in security systems.
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