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A2DP
The full form of A2DP is Advanced Audio Distribution Profile. This is a profile that helps you to stream high quality audio from one device to the other via Bluetooth. It is the same mechanism with which you are able to stream music from your mobile phone to a wireless headset, hearing aid & cochlear implant streamer, car audio, or from a laptop/desktop to a wireless headset.
Check the meaning of technical terms related to Mobile Phones: