Mobile Digital Scribe is the first device ever to capture natural handwriting from any surface, and store it in the receiver for future use. Based on a revolutionary electronic pen that uses ordinary ink refill to write on any paper, the Mobile Digital Scribe stores handwritten notes, memos or drawings for easy upload to any computer at your convenience. No special digital notepad is required.

Additionally, if the Mobile Digital Scribe is connected to a computer, handwritten text and drawings are displayed directly on the computer screen.

IOGEAR – GPEN200N – Mobile Digital Scribe

The main point here is the ‘from any surface’ thing: all the other pens need special (and expensive, you have to order them from internet and it’s difficult to find etc) papers to write on for them to work.