what is a Rio Eigen?

Never heard of it before, but saw it on Amazon earlier today. Sounds like it's the same as the Rio Nitrus, but it looks slightly different. Anyone know anything about it?

http://www.amazon.com/exec/obidos/tg/detail/-/B0000AZVUR/ref=pd_luc_mri/102-8056552-0068909?v=glance&s=electronics&me=ATVPDKIKX0DER&st=*

It's just the Nitrus in a different case. Official reference

Official reference

Er, Unofficial "Official reference" .

I suppose more of a definitive reference. Or an in-the-know reference.