E-3lue Mazer 6 button High Precision Blue LED Optical USB Wired Gaming Mouse(Black) Ultra-strong and durable:the button adopt the OMRON Jogging, and the click times up to 8million that only the high-end mouse own Ajustable DPI Function: 500/1200/1800/2500,and the bottom has unique two gears highest 500HZ rate of return adjustment,You can move it at either fast or low speeds,and it will always respond onscreen with exacting accuracy Comfortable palm feeling:with the breakthrough left and right all-wing aircraft design,the surface adopt the nanoscale skin- class material, more cater for the palm, with more comfortable palm feeling Buttons:6 buttons;Avago gaming Chipset;Polling rate: 250/500Hz Compatible with Windows XP/ Vista/ 7/ 8/Mac OS and other OS,plug & play