DiGiVision media is a revolutionary technology that Plays in Your Computer on a disc and is User Friendly. You will see and hear the speaker and at the same time the slides advance automatically. It allows you to Review the Slides at Your Pace by adjusting the play speed anywhere from half speed to double speed. You can also Save the Slides as a Picture. The most amazing feature is that you can Word Search the Entire Presentation. It Is Just Like Being At The Show!