More information from Taneli Lukka from Finland:
The programming commands and graphical symbols are not printed on the
machine itself, but in a plastic overlay that comes over the keyboard, only
the letters are really printed on the keys. If you lose this overlay the
machine is pretty useless programming vise.
There are no joystick ports on the machine itself, they are on the
miniexpander, which comes with two intellivision style disc controllers
which also have a numerical keypad. The joystick ports are 9-pin Atari
style, but they are not compatible with regular joysticks.
Another weird feature is the power supply which is external, but also
hardwired to the main unit, so you can't remove it.