Each brand of point reading pen can only point its own supporting books. The so-called point reading, you need to input the corresponding programs and corresponding books, not all books can be. Generally, the current point reading pens are aimed at fixed programs and fixed books. Everything you say is the seller's cheating on customers, so you may be cheated. Please think twice.

Extended data:

At present, the function of point reading pen is mainly realized by optical image recognition technology and digital voice technology.

1, the point-reading pen cannot be used alone, nor can it be used to read ordinary books. To achieve point reading, you need to have a supporting book, which is usually called an audio book.

2. All the contents in audio books are printed with identification codes and special coatings reflecting infrared light.

3. The identification code is actually a miniature QR code. If you enlarge the text of this book more than ten times, you can find that it contains rich digital information.

In fact, the tip of each point-reading pen has a photoelectric recognizer (OID), which can sense the digital information on the picture, touch the book with the tip, read the QR code information, and send it to the point-reading pen for processing by the CPU.