sensitive, soft, silent, smooth, stylish and slim...all words that define the macally dynamouse usb optical silent mouse for mac and pc. This mouse has a dpi button that allows you to switch between a sensor resolution of 800,1200, 1600 and 2400 dpi so you can set the tracking speed and precision to your preference. The soft-click buttons are sensitive and extremely silent so you can do your job without distraction. The scroll wheel has a double function as it allows you to scroll smoothly through web pages/documents and acts as a third button. The 5ft long cable allows you to connect the mouse to your mac or pc plug and play, no driver required, even when it's under your desk. The macally dynamouse has a stylish, matte finish and ambidextrous design that offers maximum comfort to both left-handed and right-handed users and helps to increase your productivity. features: 800/1200/1600/2400 dpi switch button to adjust sensitivity for more precise control silent soft-click buttons and scrollwheel for silent and smooth control stylish matte, slim and ambidextrous design long 5ft usb cable to connect to computer, even if it is underneath a desk system requirements: usb port; mac os x 10.1 and later; microsoft windows vista / 7 / 8 / 10 package content: usb mouse and user guide specifications: dimensions: 1.0 h x 2.3 w x 4.2 d inches weight: .16 lbs cable length: 5 feet interface: usb sensor resolution: 800/1200/1600/2400