lo        no wireless extensions.

eth0      no wireless extensions.

usb0      no wireless extensions.

vboxnet0  no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"Debian4ever"  
          Mode:Managed  Frequency:2.417 GHz  Access Point: 52:32:59:1D:30:B0   
          Bit Rate=150 Mb/s   Tx-Power=17 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=57/70  Signal level=-53 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:8   Missed beacon:0