ONYX BOOX Caesar 4

ONYX BOOX Caesar 4 is a device for reading electronic books with an "electronic paper" E Ink Carta Plus screen and the built-in MOON light 2 system with color temperature control and the SNOW Field function. This model is designed for those users who are planning to use it for reading and who don't need a variety of additional functions. Thanks to the 4-core processor and 512 MB of RAM this eReader has higher performance. The smoothly adjustable Moon Light 2 frontlight system makes reading comfortable even in low light conditions, and a built-in microSD card slot and 8 GB of flash memory allow you to carry an entire library with you.

What is E Ink Carta Plus

E Ink Carta Plus is the latest generation of screens made on the "electronic paper" technology. Compared to previous models, this screen has higher definition and contrast. Pixel density of the screen is 300 dpi that is a record for this type of E Ink screens and corresponds to high-quality paper printing. Reading on such screens is as comfortable as from the page of a good paper book.

What is SNOW Field

SNOW Field is an operating mode of the screen, allowing to reduce the number of artifacts on the screen within partial refresh. If this function is on, full refresh of the screen is not needed.

ONYX BOOX Caesar 4

US$165 *

ONYX BOOX Caesar 4 screen frontlight system

Screen frontlight

The MOON Light 2 technology enables one to use the device in the dark or under poor lighting conditions. When this function is in use, soft luminescence of the screen comfortable for reading in dark rooms is being generated. It also has a color temperature control and, thanks to the use of Flicker-Free technology, the front-light system is perfectly smooth.

What is MOON Light 2

The latest researches have shown that blue light prevents the production of melatonin (daily rhythms regulator), which is necessary for a person to sleep. Therefore, after reading on a glowing screen of an ordinary tablet or smartphone, it is often difficult to fall asleep. MOON Light 2 allows you to adjust the brightness of cold and warm LED lights independently, choosing at will white light for reading during the daytime, and more yellow for reading before sleeping. The Flicker-Free technology completely eliminates shimmering of the LEDs used in this screen frontlight system. This is due to the use of a DC power supply.The Flicker-Free technology significantly reduces discomfort for sight and eye fatigue and decreases the chances of headache, caused by long use of the eReader.

High performance

A quad-core processor with 1,2 GHz clock rate and 512 MB of RAM ensures comfortable work with difficult documents. And 8 GB of nonvolatile memory and a microSD-slot supporting memory cards up to 32 GB allows the user to store a whole library.

High performance
Format support by ONYX BOOX Caesar 4

Format support

The BOOX software allows the user to open files of various text and graphic formats. When reading you can change font style and size, disposition of pages, insert bookmarks, add your own fonts and zoom documents at will.

Built-in dictionaries

There are pre-installed English-Russian and Russian-English dictionaries in ONYX BOOX Caesar 4. To translate an unknown word just choose it in the text.

Built-in dictionaries in ONYX BOOX Caesar 4

Possibility of reprogramming ONYX BOOX Caesar 4

Possibility of reprogramming

Caesar 4 allows the user to write personal software using the potentials of the Android 4.4 platform.

Long-lasting work

Low power consumption of the E-Ink display and battery capacity of 3000 mAh provides long-lasting autonomous work.

Long-lasting work of ONYX BOOX Caesar 4
Language support in ONYX BOOX Caesar 4

Language support

The BOOX allows the user to read documents in different world languages.Amongst them there are such languages as Russian, English, German, French, Spanish, Arabic, Swedish, Chinese, Japanese and many others.

ONYX BOOX Caesar 4
ONYX BOOX Caesar 4
ONYX BOOX Caesar 4

ONYX BOOX Caesar 4 is a device for reading electronic books with an "electronic paper" E Ink Carta Plus screen and the built-in MOON light 2 system with color temperature control and the SNOW Field function. This model is designed for those users who are planning to use it for reading and who don't need a variety of additional functions. Thanks to the 4-core processor and 512 MB of RAM this eReader has higher performance. The smoothly adjustable Moon Light 2 frontlight system makes reading comfortable even in low light conditions, and a built-in microSD card slot and 8 GB of flash memory allow you to carry an entire library with you.

Display6", E Ink Carta Plus, 16 shades of grey, 1072 × 1448 pixels, pixel density 300 ppi with the SNOW Field function
Processor4-core, 1,2 GHz
Front lightMOON Light 2
RAM512 MB
Internal memory8 GB
Expansion slotFor micro SD/microSDHC cards
USB interfacemicro-USB
Supported file formatsText: TXT, HTML, RTF, FB2, FB2.zip, MOBI, CHM, PDB, DOC, DOCX, PRC, EPUB, PDF, DjVu
Graphic: JPG, PNG, GIF, BMP
Others: CBR, CBZ
BatteryLi-on 3000 mAh
Operating systemAndroid 4.4
Size170 × 117 × 8,7 mm
ColorBlack
Weight182 gr
KitONYX BOOX Caesar 4 eReader
User's manual
USB cable
Warranty card
Warranty period1 year

Note: Since a part of the Flash memory size is system software, the portion available to the user is less than the total size of the memory chip.

The device is designed primarily for reading electronic books, but has some additional features which are defined by the installed software. For example, the current firmware has functions such as calendar, dictionary, access to the Internet, and others.
The device is freely reprogrammable on request of the user who can install, delete and create programs.
The device has a battery that provides long, autonomous usage.

For ONYX BOOX Caesar 4 there are no updates
All answers to questions (total 3)

Support page

Technical support
ONYX BOOX Caesar 4

To support

Repair and service

ONYX warranty and post-warranty service, service centers

Service center

Feedback

More questions? Email to ONYX support!

Ask a question