About this item FINGER RING PRESENTATION CLICKER Finger ring concept is unique and practical, your hand remains relatively free so there's no need to set presenter remote down and misplace it. Rubber loop is adjustable to fit fingers of different size PLUG & PLAY POWERPOINT CLICKER No need to install , this remote clicker for presentation supports page up, page down, black screen, full screen, super easy to use BRIGHT LIGHT & LONG CONTROL RANGE Bright red light that is easy to see against most backgrounds; range of presentation clicker is 40-50FT, powerpoint presentation clicker light range is 328FT WIDELY APPLICABLE Clicker for powerpoint presentations supports systems: Windows 2003/XP/Vista/7/8/10, Mac OS, Linux, Android; Presenter clicker supports : PowerPoint, Google Slides, iWork (Keynote & Numbers & Pages), Prezi, MS Word, Excel, ACD See, Website, etc. RECHARGEABLE PRESENTATION REMOTE Only requires 1 hour of charging time, support one week of using, slide clicker support auto sleep function to save energy.