root@kali~# uname -a
Linux kali 3.12-kali1-amd64 #1 SMP Debian 3.12.6-2kali1 (2014-01-06) x86_64 GNU/Linux

# plug card in

root@kali~# dmesg |grep rt2
[ 6764.975119] ieee80211 phy0 rt2x00_set_rt Info - RT chipset 3070, rev 0201 detected
[ 6765.249442] ieee80211 phy0 rt2x00_set_rf Info - RF chipset 0005 detected
[ 6765.258594] usbcore registered new interface driver rt2800usb
[ 6765.299479] ieee80211 phy0 rt2x00lib_request_firmware Info - Loading firmware file 'rt2870.bin'
[ 6765.300555] rt2800usb 2-11.0 firmware direct-loading firmware rt2870.bin
[ 6765.300559] ieee80211 phy0 rt2x00lib_request_firmware Info - Firmware detected - version 0.29
root@kali~#

root@kali~# airmon-ng check kill


Found 3 processes that could cause trouble.
If airodump-ng, aireplay-ng or airtun-ng stops working after
a short period of time, you may want to kill (some of) them!
-e
PID	Name
2569	NetworkManager
2690	dhclient
13089	wpa_supplicant
Killing all those processes...
root@kali~#

root@kali~# airmon-ng start wlan0


Interface	Chipset		Driver

wlan0		Ralink RT2870/3070	rt2800usb - [phy0]
				(monitor mode enabled on mon0)

root@kali~#
root@kali~# airodump-ng --channel 6 mon0