MOD-WIFI-AR9271(-ANT) is USB WiFi adapter which is with Open Source Linux driver and Linux Kernel build in support since Kernel 2.6.35
New Alfa AWUS036NHA, Configuring for Kali, and Scanning
Atheors AR9271 Wifi Adapter USB Adapter - Atheors
How to Hack Wi-Fi: Choosing a Wireless Adapter for Hacking « Null Byte :: WonderHowTo
zSecurity AR9271 2.4 Ghz USB Wireless Adapter - zSecurity
Generic AR9271 802.11n 150 Mbps Wireless USB WiFi Adapter with WiFi Antenna WLAN Network Card Compatible with Kali Linux/Linux/Ubuntu/CD Linux/Windows 7/8/10/Centos - Buy Generic AR9271 802.11n 150 Mbps Wireless USB WiFi Adapter
GL-USB150 OpenWrt Microrouter Looks Like a USB Flash Drive - CNX Software
GitHub - vanhoefm/modwifi-ath9k-htc: The firmware for QCA AR7010/AR9271 802.11n USB NICs
Check if Your Wireless Adapter Supports Monitor Mode & Packet Injection, by Frost
Can we use laptop wifi adapter for penetrate testing instead of monitor mode adapter wifi? - Quora
Buy Atheros AR9271 802.11n 150Mbps Wireless USB WiFi Adapter
USB Modules
MOD-WIFI Olimex LTD RF Receiver, Transmitter, and Transceiver Finished Units