Features: <br />Ergonomic design fits your palm to the maximum extent・ give best comfort and support of long time use for each day. <br />Buttons: 7 buttons with scroll wheel ( two side-buttons・ one DPI button). <br />Two side-buttons: Frontward and back buttons・ you can free to move forward or back when you browse the pages and folders. <br />Adjustable DPI button: You can optionally adjust the sensitivity and resolution of the mouse according to your need. <br />Cool colorful LED light gives you a great visual effect. <br />Classic water flowing crack makes it more attractive. <br /><br />Specification: <br />Adjustable DPI: 1000DPI / 1600DPI/ 2400DPI/ 3200DPI/ 5500DPI <br />Max DPI: 5500DPI <br />Color: Black <br />System support: Windows 2000・ Windows XP・ Windows 7・ Windows Vista・ Windows 98・ Mac OS・ Windows ME・ Windows 8 or more <br />Interface: Wired <br />Connection: USB2.0 <br />Cable length: approx. 145cm/4.75 feet <br />Product size: approx. 127*78*38mm/5*3.07*1.49'' <br />Net weight: approx. 132.9g