What's this — PDS double adaptor?

[elbaroni]

Hard to tell — Daystar adaptor of some sort, looks like it makes one slot two, but for what slot?

http://cgi.ebay.com/DAYSTAR-digital-expansion-card-for-apple_W0QQitemZ250247608625QQihZ015QQcategoryZ51046QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[Anonymous Freak]

It's a IIsi PDS adapter.