Electronise Design do not appear to have been trading for some time..
What do you need to know?
I *think* it is a reversible, 8 amp speed controller. - If I have decoded the part number correctly.

The little potentiometer adjustment is 'inertia'. - I guess you know how it connects-up?
Only thing I can no longer recall is what the 'mode' setting does. - Must be getting old!