Regualatory domain Frequency Channel

2.4 ghz features (11 channel, 14 channel, FCC decide 14 channel, max 100mW power allowded or max 100W allowded from FCC.

The 2.4 GHz band regulations have been relatively constant, given the length of time they have been operating. 

• FCC allows for 11 channels, 
• ETSI allows for up to 13channels
• Japan allows up to14 channels, but requires a special license to operate in channel 14.

For 5 GHz, countries are moving to open the frequency range 5.250-5.350 GHz (UNII-2) and the

frequency range 5.470 to 5.780 GHz for additional 802.11a channels. 

5 GHz - 802.11a/n/ac

• 5.150 to 5.250 GHz (UNII-1 - 4 Channels 36-48)
• 5.250 to 5.350 GHz (UNII-2 - 4 Channels 52-64)
• 5.450 to 5.710 GHz (UNII-2e - 12 Channels 100-144)
• 5.725 to 5.875 GHz (UNII-3 - 5 Channels 140-165)