Is the e-book a touch screen or a keyboard?

I'm sure it's okay to touch it. Go online directly, or press the navigation key, press the keyboard physically, and touch the card. The touch screen should be at least 3.7, and the screen of the keyboard should be smaller, which is very exciting to touch and read! ! Later, I regretted buying something that I touched late. It's not an advertisement, please adopt it and really help! ~~~