I have a Atheros R9285 wifi card. How can i determine , what is max. Txpower it can support?

biggenius@hackbook:~$ iwconfig
lo        no wireless extensions.

wlan0     IEEE 802.11abgn  ESSID:"Default"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:08:5C:9D:4F:40   
          Bit Rate=2 Mb/s   Tx-Power=35 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=24/70  Signal level=-86 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:140  Invalid misc:247   Missed beacon:0

eth0      no wireless extensions.



biggenius@hackbook:~$ iw phy0 info
Wiphy phy0
    Band 1:
        Capabilities: 0x11ce
            HT20/HT40
            SM Power Save disabled
            RX HT40 SGI
            TX STBC
            RX STBC 1-stream
            Max AMSDU length: 3839 bytes
            DSSS/CCK HT40
        Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
        Minimum RX AMPDU time spacing: 8 usec (0x06)
        HT TX/RX MCS rate indexes supported: 0-7
        Frequencies:
            * 2412 MHz [1] (35.0 dBm)
            * 2417 MHz [2] (35.0 dBm)
            * 2422 MHz [3] (35.0 dBm)
            * 2427 MHz [4] (35.0 dBm)
            * 2432 MHz [5] (35.0 dBm)
            * 2437 MHz [6] (35.0 dBm)
            * 2442 MHz [7] (35.0 dBm)
            * 2447 MHz [8] (35.0 dBm)
            * 2452 MHz [9] (35.0 dBm)
            * 2457 MHz [10] (35.0 dBm)
            * 2462 MHz [11] (35.0 dBm)
            * 2467 MHz [12] (35.0 dBm)
            * 2472 MHz [13] (35.0 dBm)
            * 2484 MHz [14] (35.0 dBm)
        Bitrates (non-HT):
            * 1.0 Mbps
            * 2.0 Mbps (short preamble supported)
            * 5.5 Mbps (short preamble supported)
            * 11.0 Mbps (short preamble supported)
            * 6.0 Mbps
            * 9.0 Mbps
            * 12.0 Mbps
            * 18.0 Mbps
            * 24.0 Mbps
            * 36.0 Mbps
            * 48.0 Mbps
            * 54.0 Mbps
    Band 2:
        Capabilities: 0x11ce
            HT20/HT40
            SM Power Save disabled
            RX HT40 SGI
            TX STBC
            RX STBC 1-stream
            Max AMSDU length: 3839 bytes
            DSSS/CCK HT40
        Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
        Minimum RX AMPDU time spacing: 8 usec (0x06)
        HT TX/RX MCS rate indexes supported: 0-7
        Frequencies:
            * 5180 MHz [36] (35.0 dBm)
            * 5200 MHz [40] (35.0 dBm)
            * 5220 MHz [44] (35.0 dBm)
            * 5240 MHz [48] (35.0 dBm)
            * 5260 MHz [52] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5280 MHz [56] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5300 MHz [60] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5320 MHz [64] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5500 MHz [100] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5520 MHz [104] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5540 MHz [108] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5560 MHz [112] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5580 MHz [116] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5600 MHz [120] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5620 MHz [124] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5640 MHz [128] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5660 MHz [132] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5680 MHz [136] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5700 MHz [140] (35.0 dBm) (passive scanning, no IBSS, radar detection)
            * 5745 MHz [149] (35.0 dBm)
            * 5765 MHz [153] (35.0 dBm)
            * 5785 MHz [157] (35.0 dBm)
            * 5805 MHz [161] (35.0 dBm)
            * 5825 MHz [165] (35.0 dBm)
        Bitrates (non-HT):
            * 6.0 Mbps
            * 9.0 Mbps
            * 12.0 Mbps
            * 18.0 Mbps
            * 24.0 Mbps
            * 36.0 Mbps
            * 48.0 Mbps
            * 54.0 Mbps
    max # scan SSIDs: 4
    max scan IEs length: 2257 bytes
    Coverage class: 0 (up to 0m)
    Supported Ciphers:
        * WEP40 (00-0f-ac:1)
        * WEP104 (00-0f-ac:5)
        * TKIP (00-0f-ac:2)
        * CCMP (00-0f-ac:4)
        * CMAC (00-0f-ac:6)
    Available Antennas: TX 0x1 RX 0x3
    Configured Antennas: TX 0x1 RX 0x3
    Supported interface modes:
         * IBSS
         * managed
         * AP
         * AP/VLAN
         * WDS
         * monitor
         * mesh point
         * P2P-client
         * P2P-GO
    software interface modes (can always be added):
         * AP/VLAN
         * monitor
    valid interface combinations:
         * #{ managed, WDS, P2P-client } <= 2048, #{ AP, mesh point, P2P-GO } <= 8,
           total <= 2048, #channels <= 1
    Supported commands:
         * new_interface
         * set_interface
         * new_key
         * new_beacon
         * new_station
         * new_mpath
         * set_mesh_params
         * set_bss
         * authenticate
         * associate
         * deauthenticate
         * disassociate
         * join_ibss
         * join_mesh
         * remain_on_channel
         * set_tx_bitrate_mask
         * action
         * frame_wait_cancel
         * set_wiphy_netns
         * set_channel
         * set_wds_peer
         * Unknown command (82)
         * Unknown command (81)
         * Unknown command (84)
         * Unknown command (87)
         * Unknown command (85)
         * testmode
         * connect
         * disconnect
    Supported TX frame types:
         * IBSS: 0x0000 0x0010 0x0020 0x0030 0x0040 0x0050 0x0060 0x0070 0x0080 0x0090 0x00a0 0x00b0 0x00c0 0x00d0 0x00e0 0x00f0
         * managed: 0x0000 0x0010 0x0020 0x0030 0x0040 0x0050 0x0060 0x0070 0x0080 0x0090 0x00a0 0x00b0 0x00c0 0x00d0 0x00e0 0x00f0
         * AP: 0x0000 0x0010 0x0020 0x0030 0x0040 0x0050 0x0060 0x0070 0x0080 0x0090 0x00a0 0x00b0 0x00c0 0x00d0 0x00e0 0x00f0
         * AP/VLAN: 0x0000 0x0010 0x0020 0x0030 0x0040 0x0050 0x0060 0x0070 0x0080 0x0090 0x00a0 0x00b0 0x00c0 0x00d0 0x00e0 0x00f0
         * mesh point: 0x0000 0x0010 0x0020 0x0030 0x0040 0x0050 0x0060 0x0070 0x0080 0x0090 0x00a0 0x00b0 0x00c0 0x00d0 0x00e0 0x00f0
         * P2P-client: 0x0000 0x0010 0x0020 0x0030 0x0040 0x0050 0x0060 0x0070 0x0080 0x0090 0x00a0 0x00b0 0x00c0 0x00d0 0x00e0 0x00f0
         * P2P-GO: 0x0000 0x0010 0x0020 0x0030 0x0040 0x0050 0x0060 0x0070 0x0080 0x0090 0x00a0 0x00b0 0x00c0 0x00d0 0x00e0 0x00f0
    Supported RX frame types:
         * IBSS: 0x00d0
         * managed: 0x0040 0x00d0
         * AP: 0x0000 0x0020 0x0040 0x00a0 0x00b0 0x00c0 0x00d0
         * AP/VLAN: 0x0000 0x0020 0x0040 0x00a0 0x00b0 0x00c0 0x00d0
         * mesh point: 0x00b0 0x00c0 0x00d0
         * P2P-client: 0x0040 0x00d0
         * P2P-GO: 0x0000 0x0020 0x0040 0x00a0 0x00b0 0x00c0 0x00d0
    Device supports RSN-IBSS.