They seem to be mostly used for first person viewpoint cameras on drones and other R/C vehicles. There are similar 5GHz units available for around $50. What happens if the channel keeps changing? Discovery requires experimentation, so experiment!

You can observe how long it takes for the initial response and how long it takes for things to settle down. You can fire this up and see how ARM responds. They have dip switches to select between 3 or 4 frequencies and will generate 100% duty cycle transmissions. The 2.4GHz versions of these are available for about $20 and usually are powered by a 9V battery. The first tool is a common one for testing how a network will respond to interference: The analog camera. Intentional interference is a great way to get in trouble with your local regulatory body. Don't use them where you will impact other users of the band. Note: These tools create some form of interference. This gives you an opportunity to experiment and see how the network reacts to different situations. How else are we going to learn how the network responds under less than desirable circumstances? We can read about how our equipment is supposed to respond but being able to lab it up or test a real network prior to putting it into production is worth much more than just reading about what's supposed to happen. You might be wondering why one would wish to abuse their Wi-Fi. Some might call them tools for abusing Wi-Fi. Then we have some really fun tools for testing Wi-Fi.

We have tools for measuring Wi-Fi, tools for designing and predicting Wi-Fi, and tools for visualizing Wi-Fi. We use a lot of different tools in the course of designing, deploying, and validating the networks for which we are responsible. Wi-Fi gives us a lot of opportunity to play with our toys - I mean our tools.

Handheld wifi analyzer