ERGONOMIC, SLEEK AND RECHARGEABLE DESIGN -- Scientific ergonomic design encourages healthy neutral handshakewrist and arm positions for smoother movement and less overall strain MULTIFUNCTION AND CONVENIENT -- Advanced Page Backand Page Forwardfunctionality buttons provide convenience when web page browsing. 800 /1200/1600 DPI Levels -- Easily adjusts the sensitivity of the mouse HIGH-CAPACITY RECHARGEABLE BATTERY -- Built-in rechargeable battery. You no longer need to buy batteries, very convenient EASY TO USE -- One nano USB receiver at the bottom of the mouse, Just Plug and Play WIDELY COMPATIBLE -- Widely compatible with Windows 2000 / XP / Vista / 7 / 8 / 10 / Linux. Note: Not compatible with Mac OS, Apple Products Once you get used to the ergonomic mouse, you will love it so much GREAT CUSTOMER SERVICE -- Rest assured that all Acedada our ergonomic vertical mouse have unconditional 24-month product warranty ( Replace or Refund ) as well as lifetime easy-to-reach technical support