It can protect your eyes and protect your eyes from damage. You can customize the lock screen, shut down the page and customize your e-book reader. You can adjust the brightness and font size according to your preference. It is easy to operate, flat design and clear anti glare,this product is e-book reader Android tablet-based system. It is a combination. it is support the reading of common e-book formats such as PDF, EPUB, RTF, FB2, Comic book (CBZ, CBR) etc. Recommend to use pdf format to get better results, display bookshelf, recent reading, page turning effect, Touch and turn pages, font adjustment and many other reading and learning functions.