Fly through long documents and web pages with just a flick of a nearly frictionless hyper-fast scroll wheel. Soft side rubber grips and a sculpted design that give you more palm support and better control for long hours of productivity at the office or at home. Use Logitech software options and the seven programmable buttons to customize efficient, task-specific shortcuts such as back-forward navigation, copypaste, music controls and more. Optical sensor with adjustable 400-4000 dpi levels for fast, precise cursor control tailored to your needs and movements on your laptop or computer—no mousepad needed. Plug and play functionality—just plug it into your USB port and you're good to go—no battery needed.