Targus PAWM001U Wireless Optical Mouse/Pointer/Presenter Portable 2.4Ghz Presenter: Page Up, Page Down Between Presentation Slides, or Use The Laser Pointer to Call Attention to Graphics or Other Items On The Screen Optical Wireless Mouse: Optical Technology with a Wireless Radius Up to 50 Feet Power Management Features: Compact Integrated Receiver/Charger Base for Recharging, and On/Off Switch to Preserve Battery Life Compatible with Windows 98SE, 2000, ME, XP