Look at the sticker on the adapter. Many will print a model number like:
The term refers to a Wi-Fi standard introduced in 2009. It was a significant leap forward from the previous "g" standard, offering higher data rates (up to 600 Mbit/s) and better range through the use of Multiple Input, Multiple Output (MIMO) technology. While newer standards like 802.11ac (Wi-Fi 5) and 802.11ax (Wi-Fi 6) have since arrived, the "N" standard remains perfectly adequate for web browsing, standard definition streaming, and email. usb 2.0 wireless 802.11 n driver download
Before downloading a driver, you must find out who actually made the chip inside your USB adapter. How To Download And Install WiFi Adapter Driver Without CD Look at the sticker on the adapter