Mice & Trackballs say goodbye to wrist pain!A scientific engonomic mouse- encourage comfortable natureal handshake holding best care your wrist and palm 2.4G Wirele Technology Just plug a nano receiver into your computer's USB port for reliable wirele connection. No driver needed. Enjoy free wirele work without any interference within 10 meters. Reduce Wrist strain natural handshake position High sencitivity Easily switch between three dpi level Easier Web Browsing Navigate through web pages with ease using our forward/backward side buttons, streamlining your browsing experience.Buyer Notice: The vertical mouse can not fully compatible with MacBook, Mac OS X operating system. The backward and forward browsing buttons will not work, and the scrolling is contrary to Mac, because Apple company product only support its own system. Wide Compatibility Our wirele vertical mouse is well compatible with most system including Windows 7 / 8 / 10, XP, Vista and Linux. making it the perfect choice for your PC, Laptop or Desktop. Not fully compatible with Apple products Responsive Clicks and Smooth Gliding Enjoy responsive clicks and precise tracking with adjustable 800 / 1200 / 1600 DPI settings, silent click with le noise, perfect for your everyday computing needs. for Small Hand Dimension: 4.1*2.7*2.3 inches. Fits small hands well. Please confirm the size before buying it. What You Get One Wirele Vertical Ergonomic Optical Mouse, one 2.4G USB receiver ( In the Bottom of the Mouse, Plug & Play) and 12 month warranty.