Canon's Digitizer Pointer puts you in front of your audience, in focus, responding to them and commanding their attention. Don't be tied to the computer in order to work your presentation, missing out on the two-way communication that is mission-critical to any presentation's success. ??Use the Digitizer as a standard pointer to focus the audience's attention on a key part of the presentation. The Digitizer works as a wireless mouse to access drop-down menus or change screens as if you were interacting with a large-screen computer monitor. Use it as a marking pen to highlight key areas of the projected image or add simple graphics, numbers and/or letters. There's no special screen required.