Ergo 300 4D Scroll Wheel 1200dpi Mini Optical Mouse Mini Mouse Brings You More Featuring an advanced ergonomic design, new optical lens technology and a 4D scroll wheel, Ergo 300 gives you great comfort and an appealing outlook to your desktop or laptop. Using the latest optical lens technology from Genius, Ergo 300 can work on many special surfaces like photos, magazines, and most marble and tile surfaces. For more convenience and efficiency, the 4- way scroll function lets you navigate horizontally or vertically through documents or websites. In addition, the mini lightweight and ergonomic design is very suitable for travel and notebook users. You can carry Ergo 300 around easily and use it just about anywhere. For environmental protection, Ergo 300 is a lead-free design and meets the ROHS and WEEE regulations. Ergo 300, with the above advantages, will exceed your imagination once you plug it in. Key features: Ergonomic design and comfortable; better alternative to notebook touchpad 1200dpi optical sensor for superior precise tracking; no cleaning required 4D Scrolling function---Up/Down/Left/Right scrolling New lens technology works reliably on glossy or uneven surfaces