It was a bad idea to buy it, the money was wasted.
I bought my mother so that she would not particularly suffer with a double click.
Who cares to see what's inside
Look here
Kensington Orbit Optical K64327EU
Pros
Ball
Cons
1 ball is not attached in any way
2 no scroll
3 no middle button
4 very light
5 its software does not see its atsed mouse and it is not possible to configure something there
6 The Chinese are too lazy to clean up the barn on the board after themselves.