... modes:Presentation mode,Mouse mode,Multimedia mode. I.Presentation modeFunctions: 1 .Open my computer 2 .Page Up&down 3 .Laser Pointer ... pointer up,down,right,left5. Laser Pointer III.Multimedia modeFunctions: 1 .Volume up/down ( Roll up/down, Increase/decrease the ... system: Windows 98,Se, Me, 2000,XP, Vista, Win7 etcUSB port: USB1.1 or USB2.0 is compatibilityWorking voltage: USB electricity supply (4 ...