The Presenter Expert stores your presentation on a 2 GB dongle that stores inside the presenter. 2 GB is plenty of space to store multiple presentations, so you can relax knowing that when you've got the Presenter Expert with memory, you've got everything you need. And being more relaxed is always a good thing when it comes to presenting. You can also relax knowing that the Presenter Expert's intuitive four-button design makes it easy and intuitive to navigate your Keynote or PowerPoint presentation. The Presentation Expert will help you make your point with a bright green laser suitable for even the bigger rooms and brightest screens. The green laser is 10 times brighter than standard red lasers, so it stands out against even the bright LCD and plasma displays. What's more, when you need to move your cursor, a quick flip of a button gives you full cursor control. Like all of the Expert's buttons, it's easy to find in dark rooms thanks to backlighting. The powerful 2.4 Ghz remote resists interference and lets you control Keynote or PowerPoint from up to 150 feet away.