? Why Special: Unique Design - Reduce Tension - Scientific ergonomic design encourages healthy neutral "handshake" wrist and arm positions for smoother movement and less overall strain. It does take some time to get used to using a mouse at a different angle. Once you get used to it, you will love it so much ! ? High Responsiveness: 800 / 1200 / 1600 DPI Resolution Optical Tracking Technology provides more sensitivity than standard optical mice for smooth and precise tracking on a wide range of surfaces, Sensitive Mouse Click with Less Noise. ¡¾ Please confirm the size before buying it. ¡¿ ? Advance Functionality: Added next / previous buttons provide convenience when web page browsing. The superior choice for internet surfers, gamers and people who work at the computer. ¡¾Buyer 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: Compatible with most system including Windows 7 / 8 / 10, XP, Vista and Linux. Fit for Notebook, PC, Laptop, Computer, and other device. ¡¾ Not fully compatible with Apple products ¡¿
