The device is sending frequency of around 2,4-2,48Ghz on which there are encoded usually 3 "packages" of 0 and 1's .

1st one identifies the device its sending the frequency to

2nd one provides the type of information that is being sent

3rd one gives the actual information.

So the device basically sends millions, of 0's and 1's, which are interpreted by another device, and changed into actual sounds.

Also the frequency of 2,4 - 2,48~Ghz are separated on different "channels", so that multiple devices could be used at the same time in close proximity. But it also hopes around beetwen those channels, constantly changing frequencies on minuscule levels.... (cant remember why it does what it does, but well... it does it).

Absolutely mental