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.
Other formats
Many advanced reader models are able to "perceive" not only e-readers, graphic files and videos, but also other file formats. The most common support for music files:
MP3, WMA, in especially advanced cases —
AAC, OGG, lossless formats APE and
FLAC. Of the non-musical formats, some readers support
ZIP and RAR archive files, as well as Microsoft Office documents (PPT(X), XLS(X))
RAM
The amount of the reader's own RAM, that is, the memory used for temporary data storage during operation. The speed of the e-book directly depends on the amount of RAM, especially when working with large files. So the average value can be considered
RAM 1 GB and
2 GB, and more advanced models have
3 GB,
4 GB and even
6 GB of memory.
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).
Dust-, waterproof
The level of protection of the device electronics. It is determined according to the IP standard and is marked with two numbers: the first indicates dust protection, the second — about water protection.
Dust protection values:
5 — dust resistance without complete closure (a certain amount of dust can get inside, but it is small and does not affect the operation of the device)
6 — full protection (dust is not able to penetrate inside the case).
Waterproof values:
6 — protection against sea waves and strong water jets (some of the water may get inside, but it does not impair performance);
7 — the possibility of short-term immersion under water to a depth of 1 m (protection against falling into puddles and other shallow water bodies);
8 — the possibility of long-term immersion to a depth of 1 m or more (the specific value may vary), as well as long-term work in a submerged position.
