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.‎