Buy on Aliexpress USB Wi-Fi 5dBi
Price — 2.45 USD
Unlike Nano USB Wifi for ~2$
without the antenna, USB Wi-Fi 5dBi
with detachable antenna can search wireless network much better, and more expensive, only 50 cents.
Besides — detachable antenna with standard RP-SMA connector that allows you to connect another antenna or an extension cable.