And they sell it for 43 USD? That same dongle is available on ebay for $4 including shipping.
Welcome to the FSF's "Respects Your Freedom" scam.
The vast majority of products sold with this certification are grossly overpriced versions of commodity hardware which happened to already meet the FSF's expectations. In many cases, the only customization performed by the "manufacturer" was rebranding and/or repackaging the item.
And if you do want Bluetooth, the only option is an ancient USB dongle. (Only supporting Bluetooth 4.0 suggests that this hardware is ~10 years old.)
https://www.thinkpenguin.com/gnu-linux/penguin-usb-bluetooth...