Product review (5 stars): Just what I needed
I used it to control an inline damper to supply makeup air into the kitchen where I had just installed a large range hood.  Since it was not the application listed on the documentation I had to read between the lines, so to speak, to create the electrical connections.  Additional diagrams for other uses would have been helpful but it worked like a charm when I figured it out.  And I didn't cook the circuitry either.
A smaller device would be great and there is no mounting method.