root@OpenWrt:~# iwinfo phy2 info
phy2      ESSID: unknown
          Access Point: 00:00:00:00:00:00
          Mode: Unknown  Channel: unknown (unknown)  HT Mode: HT20
          Center Channel 1: unknown 2: unknown
          Tx-Power: unknown  Link Quality: unknown/70
          Signal: unknown  Noise: unknown
          Bit Rate: unknown
          Encryption: unknown
          Type: nl80211  HW Mode(s): 802.11b/g/n
          Hardware: USB 0BDA:8179 [Generic MAC80211]
          TX power offset: unknown
          Frequency offset: unknown
          Supports VAPs: no  PHY name: phy2