Scroll wheel for the control freak our innovative micro precise wheel packs more grooves per millimeter giving you the ultimate navigation experience built for hands like yours with its ergonomically shaped design and soft rubber grips this mouse is built for comfort go for years yoursquoll get three years of battery life itrsquos so hassle free you might just forget it runs on batteries more power you pop the tiny logitech unifying receiver in your notebook and leave it there you can even a