iClone Atomizer Technology (IAT). How does it work? Electrons flowing through the speaker wires are synchronized with those flowing to the monitor. Frequency, Pitch, & Color Intensity combine to simulate the sensation. Classroom tested. It Works up to 20 feet away. No scratching required. However, it's most effective when speakers exceed 1 inch in diameter, are positioned within three feet of the monitor, and subjects are within 8-12 feet of the speakers and monitor. Or is it just the power of suggestion? Visit www.HistoryClassRoom.com for more information on Multiple Learning Styles. How many different "smells" were you able to distinguish? Less