SANOXY® is trademarked brand. Exclusively marketed by authorized resellers on Amazon to ensure warranty. SANOXY multifunctional 2.4GHz Wireless Laser PresenteR with trackball mouse For Microsoft Office PowerPoint® and other presentations from up to 15 meters /50 feet away from your PC. You can highlight key information during presentations with the laser pointer. It works as a laser pointer, a optical mouse, a PC remote and a multimedia keyboard. It comes with a transmitter and a USB receiver.Laser distance: Up to 200 meters. It is a great tool for PowerPoint presentations! Functions: Laser pointer, Trackball mouse, Desktop/My computer, Close/E-mail, Internet/Favourite, Page up/Zoom out, Page down/Zoom in, Alt/Tab and ESC. Operation system: Windows 98/Se/Me/2000/XP, Mac OS, Linux Trademarked SANOXY® products are marketed exclusively by AUTHORIZED RESELLERS ONLY in order ro ensure product warranty and consumer protection. Any misuse of SANOXY® brand use without prior approval from SANOXY USA will take legal action.