lo        no wireless extensions.

eth0      no wireless extensions.

irda0     no wireless extensions.

vboxnet0  no wireless extensions.

wlan0     IEEE 802.11abg  ESSID:"Hercules"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: Not-Associated   
          Tx-Power=30 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off