TsukabaAze 1 This mouse is harmful than you might imagine.I have used a mouse with the same "appearance" for 6 years until its button broke. Because this new mouse had the same appearance, I thought the internal would be identical. But right after you open the package, you could notice that the cable is inferior. Also, the sensors felt nonresponsive. You may see the internal chip from the attached image(left is old, right is new). I thought of giving this mouse a try before I noticed this mouse affecting adjacent USB devices. Using the mouse made significant noise to my DAC. In the end, I switched the upper part of the mouse, using the old sensor and button from the new mouse.p.s. I saw a review that changing DPI also clicks the mouse. When I ripped this mouse apart, I have noticed that PCB was connected.