The mouse makes a very high-quality impression, there were even batteries here. After a short adjustment period it is very comfortable to hold and can no longer keep in mind that a vertical mouse is used. The support for the heel of the hand can remove what a little freer movement of the hand allows, but nevertheless ensures a correct posture.
Drivers for additional functions (Button assignment etc.) can relate to the seller, the questions quickly and engaged answered. For normal use, no special drivers are needed, just plug and play.