SPECS: 1：Product model:X300 Mechanical Macros Define the game mouse 2：100% new mouse game 3：High-end brand mechanical macro definition gaming mouse 4：Human body engineering design  5：7 programmable keys 6：Cool LED variable light effect 7：4-level adjustable DPI, Max. 3200 DPI(1200/1600/2400/3200DPI) 8：USB plug and play 9：Switch life：20million cycle 10:Cable length: 165cm 11 :Item Weight:168g 12:Item Size：127*80*39MM(L * W * H) 13 :Package Weight:234g 14 :Package Size:159*121*47MM 15:Support Windows 2000 / XP / win7 / win8 /win10 Vista 32bit IOS or  latest.    The way to quickly turn on/off the breathing light: First press the side button (forward button or back button), and then press the DPI button.  Press both DPI button and the side button (advance button or retreat button) at the same time.   The custom driver download and use： 1. Insert the driver CD to computer, and run the "setup.exe" installer. 2. The installation can be started when the mouse is successfully connected and in normal use. 3. When the installation is completed, "X300" drive icon appears on the desktop. 4. Basic Setting, Advanced Settings, Breathing LED Settings available. 5. In Basic Setting, custom settings are supported in drop-down list of each button. 6. In Advanced Setting, the macro editing is supported and the macro catalog can be added or deleted. 7. In Breathing LED Setting, long light, light-off and change of DPI defined light are supported. 8. When settings done, click Application, and click Save the Configuration. You should boot the driver again when next use so that all the self-defined functions can be used.