This is the ErgoMotion mouse from Smartfish, which allows us to move our wrists while using the mouse and bid farewell to the "mouse hand" : ErgoMotion is a rather bold innovation in the structure of the traditional mouse, the equivalent of a normal mouse split down the middle into two layers, and then connected with a ball connecting rod - the use of the same way we are familiar with the traditional mouse, the only difference is that the upper layer, which is the part of our hands, Will be able to tilt forward and back and swing left and right under the support of the lower layer! According to Smartfish, this swing is ergonomic, for example, when moving the ErgoMotion mouse left and right, our wrist will naturally follow the left and right rotation, and adjust the Angle of the front and back, rather than the traditional mouse wrist is also moving in a plane, which can cause strain over time.