This system comes from germany but many clones exist in several other countries. The documentation is both in english and german.
This picture doesn't show the cables because they all could be stored into storages. Detachable controllers have their own cable storage at their back and the main unit has got a large storage for the video cable (see more pictures section).
This is in fact a classic pong system that uses the GI AY-3-8500 chip, thus playing the 4 basic pong games. No shooting games here though the AY-3-8500 includes these games. They simply did not put any rifle plug :(
The score is displayed on screen but there are two other sliders on the unit that allow the players to play set by set. Once one of the player win by scoring 15 points on screen, he manualy scores 1 on the unit and so on...
Now, it's a quite common system in europe and not a so nice looking one compared to others.