Advantages and disadvantages of reading on a balance ball
The balance ball is popular as a simple exercise item. In this issue, we summarize the advantages and disadvantages of reading on a balance ball.
[Latest in 2022] Summary of e-book readers and e-paper tablets that can use micro SD.
Micro SD compatible e-book readers that allow you to store a large amount of e-book data and read books from a large library whenever you want. From dedicated e-book readers to e-paper tablets, we have compiled a list of models that support micro SD.