In addition I can confirm that it is very strong! During these few months of use, I have not formed. I must say that I ride my pc in every corner and I'm not very careful with the mouse! So she fell many times and suffered shock which believe me every time she would not function afterwards. Well no, it is still there and works like new. Not even a little sound of something broken inside when the shaking. Impressive.
I rarely write reviews on items that I buy, but here I had to. While it is simple, but goes really well.
In a next order, I will command several because for this price, this mouse is great.