Security researchers sometimes use these legacy adapters because they lack Bluetooth coexistence and have simple, well-documented firmware for packet injection (though not as good as Atheros chips for hacking, it works for basic monitoring).
Typically ranges between 40–90 Mbps , which is plenty for HD video streaming and general web browsing. Interface: USB 2.0 (compatible with USB 1.1/3.0 ports). Why Is It Still Popular?
The RTL8188CU is a highly integrated single-chip wireless LAN (WLAN) USB 2.0 controller designed by Realtek Semiconductor Corp. Released during the late 2000s and peaking in popularity from 2010 to 2015, this chipset was the workhorse for budget-friendly “N” adapters.
As the industry shifts toward Wi-Fi 6 and 6E, the RTL8188CU stands as a reliable, albeit older, standard for basic wireless connectivity. Technical Specifications and Capabilities