<b>Product Description:</b><br><br> The unique, upright and ergonomically superior design of the Wired Vertical Mouse reduces harmful arm and wrist tension by allowing your hand to operate the mouse while remaining in its natural position. A new mouse for the 21st century. You deserve it!<br><br> <b>Ergonomic Design:</b><br> A well-designed and contoured mouse body supports your palm and cradles your thumb and pinky finger. The ergonomic design allows smoother movement and prevents wrist strain caused by traditional mice<br><br> <b>High Responsiveness:</b><br> Simply press the DPI button and switch between DPI levels 800, 1200 and 1600 to adjust the mouse's responsiveness to suit whatever you're doing. Optical Tracking Technology ensures greater sensitivity for precise tracking on a wide range of surfaces<br><br> <b>Wide Compatibility:</b><br> Compatible with most system including Windows 2000 / ME / XP / Vista / 7 / 8 / 10 / Mac /Linux etc<br><br> <b>Specification:</b><br> Color: black<br> Mouse size: 105.2X 68.5 X 58.3mm<br> Number of the Key: 6 Buttons<br> DPI: 800-1200-1600<br> Power Source: Wired<br> Warranty: Lifetime <br><b><br> Package contents:</b><br>1* Wired Ergonomic vertical mouse <br> 1* User Manual