Sensitive, soft, silent, smooth, stylish and slim are just a few words to describe the all new silent mouse by Macally. With it's high grade sensor, ambidextrous frame and reinforced button cushions, the DYNAMOUSESG is built to last and will look great in any creative and tasteful workspace. It's time to upgrade. The soft-click buttons are sensitive and extremely silent so you can do your job without having to disturb your coworkers, clients or even yourself. No more click headaches. DPI ON-THE-FLY This mouse has a DPI button that allows you to switch between a sensor resolution of 800, 1200, 1600, and 2400 so you can set the tracking speed and precision to your preference. SMOOTH SCROLLING The scroll wheel has a double function as it allows you to scroll smoothly through web pages/documents and acts as a third button.