802.11n 20MHz/40MHz ;
USA, Canada (FCC):11 channels (2.412GHz~2.462GHz)
Europe (CE): 13 channels (2.412GHz~2.472GHz)
Japan (TELEC): 14 channels (2.412GHz~2.4835GHz)
It can easy to change the reigon by the steps as below.
Go to 10.10.1.1/syscmd.asp
For 1~11 channel >> flash set HW_WLAN0_REG_DOMAIN 1For 1~13 channel >> flash set HW_WLAN0_REG_DOMAIN 3
STEP2: Turn off power
If you just use iPad, this method (CH13) will improve the speed.
But NOT all of PC can receive CH13!!!!!!
The demo is as below.