It is the equivalent of a SATA to USB adapter cable, with wall wart power
source.
And a plastic box to hold the drive. At least it protects the drive,
instead
of leaving the raw drive sitting on the table. Didn't hear mention of a
cooling fan.
I'm surprised the review descriptions are so positive. Only spotted one
DOA
in the list, and no complaints about capacity related issues (like not
working
with a 1TB drive). Only time will tell I guess.
Paul