The star machine is only the size of a fist. You can connect your mobile phone via Bluetooth and then print it with the APP of the star machine.

As for the learning function mentioned by the topic owner, it is actually some helpful learning functions in the APP, such as taking photos to search for questions, printing questions, punching in words and so on.

I'm also using the star machine, which is basically to search for the wrong questions with the star machine, and then print out the answers and analysis to make the wrong questions, which would have helped me to review more pertinently, because I don't have to look through books to find the answers or copy the questions by hand, and the efficiency will be much higher. I sometimes use the star machine to print some formulas and knowledge points to memorize, which is quite easy to use.