... Green Laser pointer2. Play PowerPoint ( For PowerPoint only ) 3. Page up/Page down4. Built-in flash memory is optional (no memory/64 ... /128/256/512/1024MB )III Operation System Windows 98, Se, Me, 2000, XP ... *14*14cm Weight: 15g(Without battery) Operation System: Windows 98, Se, Me, 2000, XP, Windows Vista, Windows 7, Mac OS, Linux USB Version ...