Bluetooth Protocol
A2DP: The chip in the headset is used to transmit data to achieve high-definition sound. A2DP
headphones are Bluetooth stereo headphones. The sound can reach 44.1kHz, and ordinary
headphones can only reach 8kHz.
AVRCP (Audio / Video Remote Control Profile): Provides a standard interface for controlling TV,
Hi-Fi devices, etc.
HFP (Hands-free Profile): Allow Bluetooth devices to control calls, such as answering, hanging up,
rejecting, voice dialing, etc. The rejection and voice dialing depends on whether the Bluetooth
headset and phone support it.
HSP: After connection and configuration, the headset can be used as the audio input and output
interface of the remote device.
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