Bandwidth: The channel frequency coverage range of the Wi-Fi. It is suggested to
use default parameter.
Channel: The router will not choose the best channel itself. You need to choose a
channel manually. If your router is used as a Wi-Fi repeater, the channel will be
fixed according to the connected wireless network.
TX Power (dBm): It specifies the signal strength.
Channel Optimization: It will optimize your Wi-Fi signal and channel according to
the Wi-Fi environment.