If you are on Ubuntu, Debian, or Raspberry Pi OS, do not use the default driver. You need the driver.
Here is everything you need to know to get this adapter running at full speed.
The official repository has a working driver now:
The "EU" suffix specifically denotes the version of the chipset optimized for USB interfaces and external power efficiency. You will find this chip inside brands like TP-Link (TL-WN725N), Edimax (EW-7811Un), Cudy, and hundreds of generic "Mini Wi-Fi Adapters."
Designed for high-throughput performance with low power consumption. Common Use:
