Here are the specifications for a typical USB 2.0 wireless WiFi adapter with 300Mbps and 802.11n support:
Data Transfer Rate: Up to 300Mbps
Wireless Standard: IEEE 802.11n (backward compatible with 802.11b/g)
Frequency Band: 2.4GHz
Security: Supports WEP (64-128-bit), WPA, and WPA2
Quality of Service: Supports WMM (Wi-Fi Multimedia)
Interface: USB 2.0
Compatibility: Works with most operating systems, including Windows, macOS, and Linux
Design: Compact and lightweight
These adapters are great for adding high-speed wireless connectivity to desktops or laptops through a simple USB port