Features: 1. Each piece of paper can be reused more than 500 times. 2. Erase and reuse your notebook 3. Three wiping ways: you can wipe it with wet tissue, pencil ends or hair dryers Cover 4.wait 15 seconds for the ink to dry so it can be glued to the special paper 5. A smart notebook is equal to 500 regular notebooks. specification:Material: PP Cover Color: Black Writing Materials: Environmentally Friendly Paper Inner Paper Weight: 123g Size: A5 / 148 x 210mm, A6 / 107 x 172mm Number of inner pages: A5 / 50 sheets, A6 / 40 sheets Inner page style: horizontal line, dial point Wiping method: wipe with wet tissue, pencil end, hair dryer Package Includes: 1 x Notebook 1 x Erasable Pen PackageList:1 x Notebook1 x Erasable Pen