Hi Martin,
Its the sort of mini motherboard used by car puter enthusiasts.
The "memory stick" is a WiFi aerial like you use indoors to network your computers.
It networks with a laptop on the bank or pondside.
There is a module plugged into the motherboard usb connection which is used to control servos etc.
Ole' computer control of a boat from a "playstation" handcontrol plugged into a laptop.
It only works when I have number one son with me! otherwise its running on a Robbe Navy setup.
alan