The Unity Net 100 is a 100BaseTX PCMCIA network card for the Amiga. It is probably the only 100BaseT networking solution for the Amiga. It's designed for use on the PCMCIA connector on the Unity card in Zorro Amigas. It is probably not compatible with an A600 or A1200 because their PCMCIA slots would not be fast enough, or at the very best you would not be able to run the card at full speed.
-64KB Onboard buffer
Information from Kato Developments Website.
-10MBit and 100MBit Autodetection