Micro USB cable Plug it in for power and that's it.
Now you can see the WiFi traffic around you!
You can change the channel by clicking on the flash button, it will remember your channel selection even when you unplug usb cable of it.
If the on board LED lights up, that means that it recognized a lot of deauthentication or disassociation frames on that channel which could indicate a deauthentication attack!