Professional Wired Gaming Mouse 7 Button 5500 DPI LED Optical USB Computer Mouse Gamer Mice X7 Game Mouse Silent Mause For PC Feature:100% brand new and high quality Type: Wired Mouse Buttons: 7 buttons with scroll wheel. Max DPI: 5500 DPI Ajustable DPI Switch: 1600-2400-3200-5500DPI Switch Life: 5 million cycle Size: 130*86*39mm Compatible :Windows XP, Vista, Windows 7/8, MAC... User for: The high-end players & gaming professional players About the slient mouse version only the right and left button is silent ,the dpi button and forword back button has some noise 1 X Gaming Mouse Q&A Q1 :What is the difference between mute and sound? A1: when you press the button of mute mouse , the mute one make less noise than sound version Q2 :Can the backlight changed to blue or red ? A2 : The backlight like breathing light , it change the color automatically .and it can't be changed to one color