Areca's packaging hasn't changed much over the years. I've reviewed around 10 of their controllers and they have all used the same package design with a handful of small changes.
The back of the package lists several of the features about the adapter, RAID management and fine details.
Everything is packaged fairly tight inside the box. The controller is sandwiched in the middle of a few foam pieces.
The included accessories include the software disk, two SFF-8087 to SFF-8087 cables, a half-height bracket and a dense user manual.