I just tried it at home and it works great with a distance of just 10 feet or so between two locations. My laptop can see 26 unique wifi hotspots (other people

I just tried it at home and it works great with a distance of just 10 feet or so between two locations. My laptop can see 26 unique wifi hotspots (other people in the building, cafe across the street, etc), which is the number the author was referring to.