Buttons: light pointer, display of black screen, next, previous, full screen, on/off switch; One-touch keys easy to control slideshow; About pointer: hold down the button to keep the light on SUPER BRIGHT RED PRESENTATION REMOTE CONTROL : presenter is Easy to See on any Presentation Screen(Not Recommended for LED, LCD Screens). Note:PLS Do Not Directed at People or Animal’s Eye, Please Use it Properly. EASY OPERATION, UNIVERSAL COMPATIBILITY: just Plug and Play, this PPT Clicker Supports MS Word, Excel, PowerPoint, ACD See, iWork (Keynote & Numbers & Pages) Google Slide,Compatible with Windows Linux, Mac OS, Meet Different Laptops, Presentation Electronic Whiteboards , Projectors. Especially for Teachers, Tutors, Lecturers and Speakers, It Helps a lot. Widely Applicable: Presentation pointer support systems: Windows 2003/ XP/ Vista/ 7/ 8/ 10, Mac OS, Linux, Android; pointer presenter support software: PowerPoint, Google Slides, iWork (Keynote & Numbers & Pages), Prezi, PDF, MS Word, Excel, ACD See, Website, etc.