I believe they are 650MHz. I have no idea on how much memory(if any). I don't have a power adapter. They look like Sparcles, but are branded as "Sparc Mobile Server". Check this thread I authored a little while ago:viewtopic.php?f=17&t=16726161
There are 3 of them, and in fairly good condition, two of them have loose HD cover doors(all of the HD doors/covers are included). No batteries. DVD drives in each. I'm in the US(NJ). Make offer! Dreamcast broadband adapter not included!