What is HFP/HSP/AVRCP/A2DP？

HFP (Hands-Free Profile), HSP (Headset Profile), AVRCP (Audio/Video Remote Control Profile), and A2DP (Advanced Audio Distribution Profile) are Bluetooth protocols for wireless audio communication and control.

Simply Put:

HFP, HSP, AVRCP, and A2DP are like different waiters in a restaurant, each with their own role. One takes your order for calls, one brings the food as music, one adjusts the volume as controls, and one serves the drinks as high-quality audio. Your phone uses them to communicate smoothly with your Bluetooth device.