Button control
The presence of a touch screen allows you to configure and control the device using the display. However, for greater convenience, in many e-readers, regardless of the type of screen, the
buttons still act as the main controls. Firstly, they can be pressed with gloves or wet hands. Secondly, holding a book with two hands is much easier to press the button to turn the page than to swipe your finger across the screen.
E-book formats
File formats supported by the reader that contain text (and sometimes graphic information). The most popular in the CIS are, in particular,
FB2,
TXT,
HTML,
WORD (DOC),
RTF,
ePUB,
Djvu and
PDF.
Photo/video formats
File formats supported by the reader that contain multimedia information — graphics or video. The most popular image file formats are, among others,
JPG(the standard format for modern digital photography), BMP and GIF; video files —
MP4, MPG,
AVI, 3GP (video format for mobile devices),
FLV, MOV.
Storage capacity
The amount of the reader's own built-in memory, i.e. the memory used for persistent data storage. The more memory, the more content can be stored at a time in the e-book. At the same time, note that even the largest text (TXT, FB2, HTML) files, usually, rarely exceed 2 – 3 MB, so relatively little memory is needed for storage. Graphic and audio files, in turn, are more voluminous, but most of the space is needed for video files. Therefore, depending on the use of the gadget, you will need a different volume, whether it be
4 GB, 8 GB or more. Many readers support the ability to expand their own memory through removable cards (see
Memory card slot).
Data transfer
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Wi-Fi. A wireless communication module that allows you to connect the reader to wireless local (home or office) networks, as well as access the Internet through public access points (hot spots) installed in restaurants, hotels, railway stations, etc.
—
Bluetooth. Direct wireless communication technology between various electronic devices. In e-readers, Bluetooth is primarily used for file transfer: with this function, you can connect the reader to another Bluetooth device, such as a laptop or tablet PC, and exchange files with it.
— microUSB. Connector for direct connection of the reader to the USB port of the computer using a special cable. In e-books, this connection is used primarily for file sharing. MicroUSB is a universal standard that allows you to connect various gadgets through it with one cable.
— miniUSB. Similar to the one described above, the connector, which differs only in the size and shape of the connector.
—
USB-C. Symmetrical USB connector, which is gaining popularity and in the future is able to displace microUSB. At the same time, the connector has a high data transfer rate and is only a little larger in size.
