deli 8 Pack Graph Paper Notebook, A5 Spiral Grid Notebook 5.8"x8.3", 80 Sheets/160 Pages, Hardcover Grid Note Pad with Clear Frosted Cover 70GSM Premium Acid-Free Paper for School Office, 5x5mm Grid ...

The set’s specially-designed paper notebook, called a “paper tablet,” is also mandatory since it includes a grid that the pen uses to record your notes in digital form.