2Wire 802.11N Wireless USB Adapter
For a list of all currently documented Ralink chipsets with specifications, see Ralink.
This adapter does not seem to have made it to market (at least, not under this name).
"002308FD7087 WN7511A-LF-ZZ" is printed on a label on the device in the FCC photos.
"P/N: 141751110000JR01A" is silkscreened on the board in the FCC photos.
2Wire P/N: 4201-100083-000
The Linksys WUSB100 v2 is also a WN7511A, but it is a different sub-model.