@DraftmanCorp 

Hi, the signal coverage of Deco is quite like a spheroid and its horizontal radius is longer than the vertical radius;

As for the height, actually, we did not test before;

I used to be put Deco 2m high on the top of my refrigerator and it is working great;

So Be sure not to put them into closets, TV cabinets, or any kind of enclosed space. Put them in an open space if you can.

As for the height, not close to the ceiling and still within reach would be suitable;

Thank you.