ship from Japan A stick-type ergonomic mouse with an almost vertical gripping angle that minimizes the burden on the wrist without twisting. It comes with a wrist rest made of soft material that distributes the force applied to the wrist as much as possible. It is equipped with an IR sensor that saves power and can be used for a long time. If you download the driver from Sanwa Supply WEB site, you can change the button assignment of the wheel button. ChromeOS does not support the assignment. For left-handed users, left-handed mode allows you to assign button functions to left and right flips.