iwconfig
lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"xxx"
          Mode:Managed  Frequency:2.467 GHz  Access Point: 1C:7E:E5:38:A5:F0
          Bit Rate=54 Mb/s   Tx-Power=16 dBm
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=43/70  Signal level=-67 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:872   Missed beacon:0

eth0      no wireless extensions.