How do bluetooth devices work?
Bluetooth is a communications protocol. It's like a "language" between the devices that use it to communicate wirelessly. You could look at it as a language in this light, and for something like, say, a bluetooth cell phone to "talk" to a bluetooth headset, the units have to "speak the same language" to communicate wirelessly. And bluetooth is a language that permits each unit to reach the other with the data being transmitted and arriving in a specific way so that it can then be converted. In a bluetooth headset, our voice goes out and the audio from the incoming call arrives. These information streams are converted to digital bluetooth signals, and the data flows into and out of the headset. The headset "understands" the incoming signal from the cell phone, and can convert it into audio for us to hear. And the headset converts our voice into a bluetooth signal that it then sends to the phone, which "understands" that signal and converts it to be broadcast to the cell hub. The key to Bluetooth is the management of the information (or data) stacks, and the manner in which they are broadcast, and that is handled a little differently by different devices. Use the link below for more information.