Features: 1.Multifunction: Presentation clicker combines hyperlink, volume control, page up down, full screen, black screen, multimedia play and pause, and close current window in one function. 2.Long Range: Wireless presenter remote supports 30m/98.4ft remote control distance and 200m/656.2ft rediing distance. Bright red light, easy to see in most backgrounds 3.Compatible: Wireless presenter support for Windows XP 7 8, for OS X, for Linux, for Android systems Wireless Presentation Clicker supports for PowerPoint, for Keynote, for Prezi, for Word, for Excle, for ACD See, for iWork, etc. 4.Red Light: Wireless powerpoint remote's red light is easy to see against most backgrounds and can be used to highlight key parts of a presentation. 5.Easy to Use: Wireless presenter is the perfect tool for your presentations, teaching and meetings. Powered by 1xAAA batteries (not included). Plug and play, plug the USB receiver into your computer and use the presentation clicker. specification:Item Type: Presentation Clicker Material: ABS Remote Control: Radio Frequency Technology RF Frequency: 2.4GHz Control Distance: Approx. 30m/98.4ft Radial: 3R Optical Maser Output Power: