Looking for INFO on the Second Wave ExpanSE Home BaSE for the Macintosh Portable

As the title suggests I am looking for info on the Second Wave ExpanSE Home BaSE for the Macintosh Portable. I am kinda looking for info and how it works, if someone has one, ETC.

I can really find info on one site, where he got the photo? Probably a magazine, were any of them sold? Much questions, No answers... Yet. Thanks! - Froggy

SITE THAT I FOUND IT ON: