USB 2 or 3?
Specs are here.
Mothership reviews here.
No real indication of USB standard, though - other than it’s “high speed”…
Can it read a CAC card?
Doesn’t look like it. From the link above:
Compatible with all versions of SD/HC, MiroSD, CF, XD, MS/PRO & Duo cards
Wow. Mirosd AND its plus and play.