Superchips? Anyone know about them?

[MickyB]

Hi, today my dad had ratter look over his car to attempt to find a stalling fault, and he found a blue 'Superchip' thing plugged into the ECU. I assume it was plugged into the J3 port and is something like a Powerchip.
Just wondering if anyone knows anything about these, and what they do? The only info I have found is that they are for foreign cars, basically no Australian info.

Thanks
Michael