Any device that can display text on a screen may act as an e-reader, but specialized e-reader devices may optimize portability, readability (especially in sunlight), and battery life for this purpose. Their main advantages over printed books are portability since an e-reader is capable of holding thousands of books while weighing less than one and the convenience provided due to add-on features in these devices.[2]
Amazon'sKindle Keyboard e-reader displaying a page of an e-book
