ATV800E

 The ATV1800E
 Operating system          Android 4.4.2
 Power                     5 volts
 CPU                       AmLogic S802
 Memory                    2GB DDR3
 Storage                   16GB
 Graphics                  Mali450
 Sound                     A/V, HDMI, S/PDIF
 Connectivity              IEEE 802.11 b/g/n  10/100 Ethernet

History

The ATV1800E was released in 2014 as the first official 4K successor to the MyGica. It is equipped with a quad core AmLogic S802 and the Mali450 video processor. It is capable of scaled 4K playback, as well as nonscaled 4K playback. This was the first Mygica device to support OTA updating and also migrated from 4.4 and upgrade to 5.0 soon..

User Manual

Here is Official usermanual [1]

XBMC shrank, or not full-size display

We have Video Walk through for this too