Inon type II, III and IV differences?

Can anyone provide details on the differences between the types II and III, compared to the version currently available (type IV)?

Thanks,

Mark

Just because we have the same name, I googled your title and the 1st hit is:

http://www.uwphotographyguide.com/reviews-strobes-inon-z240

Thanks Marc,

That was exactly what I was chasing.

Cheers,

Mark