COMFORTABLE ERGONOMIC DESIGN：Scientifically ergonomic designed vertical mouse encourages healthy "handshake" wrist and arm positions for more precise and much smoother movement and less strain. Perfect for those Officemen needing long time working with mouse. | 3 ADJUSTABLE DPI: Nulaxy vertical mouse with 800 / 1200 / 1600 DPI Resolution Optical Tracking Technology, provides much sensitive than standard optical mice with smooth and precise tracking on different kinds of surfaces. | EASY TO USE: Plug and play, no lag, no loss of connectivity. The setup of the wireless vertical mouse is pretty easy, no driver installation needed. Just fit the receiver into a USB port and use with ease. ( One Nulaxy USB receiver at the bottom of mouse) | MULTIFUNCTION BUTTON: Nulaxy ergonomic mouse, with DPI switch for easily changing the cursor speed and adjusting the sensitivity of the mouse. Added forward/backward buttons provide convenience when webpage browsing, increasing your work efficiency. A sturdy scroll wheel with rubber spins makes sure that your hand will not slip when scrolling. | WIDE COMPATIBILITY: Wireless Vertical mouse Widely compatible with Windows 2000 / XP / Vista /7/8/10/ Mac / Linux. Fits for desktop, laptop, PC, Chromebook and other devices. ( Note: The Forward/Backward buttons are unavailable in Mac OS X.) Meet all your needs and your daily work easily.