This release includes an encryption feature for the Cordless Freedom™ Optical and Cordless Freedom™ iTouch™ keyboards only. Multimedia keys support Creative Labs® Player versions 1.5 and 2.x, WinDVD, Power DVD, Windows® Media Player 7, RealJukebox™, RealPlayer® 7 Basic, RealPlayer® G2, RealPlayer Plus™ G2, MusicMatch™ 4.x, LiquidAudio v4.x/5, Windows98SE® DVD player. The iTouch software uses a CHM-based Help file and Internet Explorer 4.01 or higher must be installed to view the Help file correctly. If you are using a release prior to 4.01, please upgrade your version of Internet Explorer from the Microsoft web site.