DinoFire Wireless Presenter Finger Ring USB Powerpoint Presentation Clicker Rechargeable RF 2.4 GHz Presentation Remote Control Laser Pointer Slide Advancer Support Mac FINGER RING PRESENTER REMOTE: Finger ring concept is unique and practical, your hand remains relatively free so there's no need to set ppt clicker down and misplace it. Rubber loop is adjustable to fit fingers of different size PLUG & PLAY LASER POINTER PRESENTER: No need to install software, powerpoint clicker support page up, page down, black screen, full screen, super easy to use BRIGHT LIGHT & LONG CONTROL RANGE: Bright red laser light that is easy to see against most backgrounds; Powerpoint remote control range is 40-50FT, laser control range is 328FT WIDELY APPLICABLE: Computer clicker supported systems: Windows 2003/XP/Vista/7/8/10, Mac OS, Linux, Android; Supported software: PowerPoint, Google Slides, iWork (Keynote & Numbers & Pages), Prezi, MS Word, Excel, ACD See, Website, etc. LONG WORKING TIME & AUTO SLEEP: Only requires 1 hour of charging time, support one week of using, presentation pointer support auto sleep function to save energy; 3 YEARS WARRANTY & FREE USB IF LOST IN 2 YEARS