podhradsky,   The Intel(R) Centrino(R) Wireless-N 2230 is a single band adapter and works on the 2.4GHz band ONLY. It does have Bluetooth.     Rick 
Hello.  I have intel centrino n 2230 wireless card in my alienware M17X-R4. When I search for available WLANs I can see all 2.4 GHz networks but none 5 GHz. I have Netgear WNDR3800 AP running openwrt backfire 10.03.1 settings for the AP are:  mode:802.11 a+n HT mode: 20 Mhz Channel: 40 (5.200 GHz)   i tried several config alternatives - no joy i updated the driver of the intel wifi card to the latest - no joy.  i tried to google for such or similar problem but i didnt find anything useful.  can anyone help plz ?    
centrino N-2230 cant detect 5 GHz WLANs 