Two levels and several walls to cross, this WIFI key cash without flinching: 4 to 5 bars on windows 7 signal.
Installing without needing drivers or software. The key is a bit cumbersome, I advise a small USB extension cable to place it wisely in your workspace. A small green LED on top of the key signals the data transfer (see picture).
Furthermore, and I find that this is not emphasized enough in the comments, the antenna is removable so it is possible to connect any other type of antenna with RP-SAM connector: directional, deported, etc. ....
Example:; refRID = 11FG0ASK6PQ7JH040B3B
I recommend this product, reliable and scalable.