An e-reader is a computer designed to make reading e-books more convenient. It has a similar form factor to a tablet computer, but instead of an LCD screen, it has electronic paper. This results in much longer battery life — the battery will last for many weeks — as well as improved readability, which is comparable to that of paper even in direct sunlight. The slow refresh rate and (usually) grayscale-only display of this type of display make it unsuitable for sophisticated multimedia applications like those found on tablets. The lack of such apps can be viewed as a benefit, as the user can concentrate more easily on reading.
Many e-readers have built-in functionality that allows them to connect to the internet through Wi-Fi and connect to a digital Open Publication Distribution System (OPDS) library or an e-book store, enabling them to purchase, borrow, and receive digital e-books. E-books can also be downloaded from a computer or read from a memory card by an e-reader. However, since most e-readers from the 2010s lack a card slot, memory cards are becoming less common. You can also just use your phones, tablets, and PCs.