Mt Spokane Photography said:
Its going to be short range as well, probably just a few feet.
While 5GHz has a shorter range, is still some tens of metres. But walls and other structures (depends on the materials) are more "opaque" at this frequencies than at 2.4GHz, and can greatly reduce the range. That's why it is rare to see 5GHz only devices. although on some you can decided to turn off one of the radios.
Mt Spokane Photography said:
The other issue is that your router needs a bridge mode to connect wirelessly to the adapter, some have it, some don't.
Did you mean the router connecting to the adapter, and not viceversa? The OP question didn't look that.