Ergonomic design fits your palm to the maximum extent, give best comfort and support of long time use for each day. Buttons: 7 buttons with scroll wheel ( two side-buttons, one DPI button ). Two side-buttons: Frontward and back buttons, you can free to move forward or back when you browse the pages and folders. Adjustable DPI button: You can optionally adjust the sensitivity and resolution of the mouse according to your need. Cool colorful LED light gives you a great visual effect. Classic water flowing crack makes it more attractive.