xx2.4G universal channel, 360° control. xxAutomatic Frequency Hopping technology avoids other RF signal interference. xxSupporting plug and play, this presenter has good compatibility with USB1.1, xxUSB2.0, USB3.0. You are in control of your PowerPoint no matter which direction you face or which corner in a room you stand. xxSoft Silica Gel buttons allow for comfortable use. Storable receiver for easy carrying. Support functions including Page up and Page down, Fullscreen, Black screen. xxSupports Windows7 or 8 or 10 or Linux or Android or Mac OS. Used for Word, Excel, PowerPoint, Keynote, Prezi ACD See, website, iWork, and Google Slides. 868M innovative technology is not affected by 2.4G signals such as Bluetooth WIFI, and the signal is accurate and not malfunctioning. U disk function 32G, mass storage of courseware Material ABSandPC Power: 0.5mW size:138.8mmx17.6mmx15mm Presentations from up to 100 meters away Package Included: 1x USB RF Wireless Presenter PPT PowerPoint Control Controller Pen RedLaser Presenter