Amazing, for 10 mice each "5 buttons" with a double dpi mode. Instantly recognized as Seven;) The internet is fun again under Browsing ... Wired (bored piles and low autonomy) Change of sensitivity on the fly without any software installation nor any launch of any program at startup Correct quality plastic and reinforcements in the right places. And most adult size (too tiring mini mouse for my big hands!) In short very good value