✔ ERGONOMIC DESIGNED WIRELESS MOUSE : Ergonomic vertical design encourages healthy neutral "handshake" wrist and arm positions for smoother movement and less overall strain. It provides better support and accommodates your hand in a natural position, relieves pressure in wrist joint and reduce risk of cramping. ✔ HIGH-CAPACITY RECHARGEABLE BATTERY : Built-in rechargeable battery, easily recharged through the included USB cable, no need to change the battery, very convenient! EASY TO USE -- One nano USB receiver at the bottom of the mouse, Just Plug and Play ! ✔ MULTIFUNCTION AND CONVENIENT : Advanced "Page Back" and "Page Forward" functionality buttons provide convenience when web page browsing. 800 /1200/1600 DPI Levels -- Easily adjusts the sensitivity of the mouse. ✔ WIDELY COMPATIBLE : The ergonomic mouse fits for desktop, laptop, PC and other devices. Widely compatible with Windows 2000 / XP / Vista / 7 / 8 / 10 / Linux. Note: Not compatible with Mac OS, Apple Products . It does take a few days to get used to, once you get used to the ergonomic mouse, you'll love it so much and it will be helpful to your wrist ! ✔ FRIENDLY CUSTOMER SERVICE : Rest assured that all our Acedada ergonomic mouse have unconditional 24-month product warranty ( Replace or Refund ) as well as lifetime easy-to-reach technical support !