Features: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.Specification:Adjustable DPI: 1000DPI / 1600DPI/ 2400DPI/ 3200DPI/ 5500DPIMax DPI: 5500DPIColor: BlackSystem support: Windows 2000, Windows XP, Windows 7, Windows Vista, Windows 98, Mac OS, Windows ME, Windows 8 or moreInterface: Wired Connection: USB2.0Cable length: approx. 145cm/4.75 feetProduct size: approx. 127*78*38mm/5*3.07*1.49''Net weight: approx. 132.9gNote:Please allow 1-3mm differs due to manual measurement.Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.