lo        no wireless extensions.

wlan0     IEEE 802.11abgn  ESSID:"FRITZ!Box Fon WLAN 7270"  
          Mode:Managed  Frequency:2.447 GHz  Access Point: 00:1F:3F:15:8C:D0   
          Bit Rate=104 Mb/s   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=47/70  Signal level=-63 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:121   Missed beacon:0