How many calculators can be connected in a classroom?

[yangyongkang]

(11-25-2019 09:42 AM)Tim Wessman Wrote:  In China it is common to use two antennas, with a long USB cable to put the second back father n the room. They tend to have long skinny classrooms.

As a Chinese, this sentence seems a bit too real. But what do you mean by China Taiwan or China?