Somethings are hard to find on google, but it's very rare. This issue would be very easy to find on the web. If you start there, you don't have to wait for answers and it is probably someone who has a great deal of knowledge on the subject. The forums could help clean something up, but please look for it first. Most of this post is repeat after repeat of people trying to explain one subject. This website has a great deal of tutorials and you search for wireless remote tutorial or something and get thousands of results. It serves to find "How do I set up a wireless remote circuit". Wikipedia serves for more of the knowledge based items like asking "What is a wireless remote".
Most forums have searching google/wiki in the criteria for posting along with finding it in the previously posted topics in the forum. If you do end up doing this, then most will just boot you.
And the in 5 days this post took to get to the point it is now, you could be an expert on wireless controllers knowing what each part does. Don't be lazy...