Made of paper and terrific for pen or pencil. Requires no battery or electronics. May require artificial lighting to use when it would be otherwise dark. Seriously I'd much rather write my thoughts ideas and lists and take the notebook with me and sit quietly reviewing or writing outside and not be encumbered with my smart-this or smart-that while doing that. A notebook sized like this is just fine for my needs.
I keep them in my classroom. There are no stores in the town where I teach and the students are poor. They come to me and buy these for $.25 each. Some have suggested that I give them for free but my students keep their dignity with this arrangement.