RALINK USB WIFI RT5370 is a great budget wireless adapter if your on a tight budget this low powered adapter works out of the box with most Windows, Mac and Linux boxes. Tested with Kali 2.0, Kali Linux NetHunter using a OTG Cable or Micro USB to USB OTG Stub RT5370 supports Managed and Monitor modes.
With integrated antenna and 20 dBm txpower This RT5370 is an ideal choice for medium range wireless attacks.
Ralink RT5370 chipset
Host Interface: High speed USB2.0/1.1 Interface
802.11n:up to 150Mbps(downlink)and 150Mbps(uplink)
802.11g:54/48/36/24/18/12/9/6 Mbps auto fallback
802.11b:11/55.5/2/1 Mbps auto fallback
802.11 b/g/n 150Mbps
2.400-2.487 GHz channels 1-14
Power: Voltage: 5V+5%, Amperage: 70mA Average