ship from Japan It is a stick type ergonomic mouse that has an almost vertical angle and minimizes the burden without twisting the wrist. With a wrist rest made of soft material, the force applied to the wrist is dispersed as much as possible. It is a Bluetooth mouse equipped with an IR sensor that can be used for a long time with low power consumption. If you download the driver from the Sanwa Supply website, you can change the button assignment of the wheel button. * Chrome OS does not support assignment. For left-handed people, you can assign the button function to flip left and right in left-handed mode.