Features: 100% brand new and high quality Original. Work: Optical interface type USB Key number: 5+1(scroll wheel) Optical Resolution: 2500DPI Ergonomics: Supports Mouse LED: Blue LED Light System clock: 250HZ Frame rate: 3000 frames / sec Maximum acceleration: 20G Ultra-precise Scroll Wheel Customize DPI Switch: 500/1000/1800/2500dpi Ultra-quite and Low-friction Resoulution adjustable in driverless-free drive Optical technology works on most surfaces Special Edition for Gaming，built-in weight Intelligent connectivity. no need to code， plug & play Note: This item does NOT include batteries and we repack it with neutral package!! If you mind， please do not buy.