ERGO M575SP ¥8,470 Used a few times after purchase, in good condition. Will be shipped wrapped in cushioning material as there is no box. *Please note that returns are not accepted for any reason to prevent product switching. Height: 134mm Width: 100mm Depth: 48mm Weight: 145g [Quoted from the official website ↓] Sensor Technology Sensor Technology: Logitech Advanced Optical Tracking Nominal Value: 400 DPI Maximum Value: Up to 2000 DPI Buttons Number of Buttons: 5 (Left/Right Click, Back/Forward, Scroll Wheel with Middle Click) Number of Customizable Buttons: 3 (Back/Forward, Middle Click)