Goldensunsky 800/1200/1600dpi High Speed Wired Gaming Optical Mouse Mouse uses 800/1200/1600DPI Switch Dredge-up button and Page down button are added, convenient for document management and website browse fire button is added, suitable for all kinds of online game interface Pass GOLDENSUNSKY high quality test standard. Buyer beware of other imitate product that was not sold by Goldensunsky. Size: 115(L) x 77 (W) x 39 (H) +/-0.5mm