It reminded me of a certain notebook and pen (an expensive set) where each page of the notebook had a unique background pattern and the pen would record the lectures as you wrote.
Later you could put the pen down on a word in your notes and start listening to the lecture just as you were writing those notes.
Or at least as of 2010 when I put it in an Amazon.com wishlist (and #%&^%& but Amazon's search function sucks, "pen" didn't find the "smartpen" by which it's named).
This is indeed the unit a fellow student used. He dealt with ADHD, anxiety, and many other things in conjunction with medication side effects. For him, this was an invaluable study tool.
