A WiFi-USB adapter is being sold on AliExpress with claimed FCC certification.
FCC ID ANTXABGN, as of 2019-12-09 is not a valid identifier. The grantee code, ANT, is registered under QINGBANG ELECTRON (SHENZHEN) CO., LTD. – a producer of Sapphire Nettop devices. It is unlikely this manufacturer is affiliated with the unlicensed WTXUP / Ralink devices.
The title for the uncertified AliExpress listing was: Ralink RT5572 300Mbps Dual Band WiFi USB Adapter Wireless Wi Fi Receiver Wi-Fi Dongle PCB WiFi Antenna for Windows 7/8/10/Linux