- Bluetooth protocols: HSP/HFP/A2DP/AVRCP - HSP (Headset Profile): Used for mono voice calls - HFP (Hands-Free Profile): Used for calls management and the operation related to dialing / answering phone - A2DP ( Advanced Audio Distribution Profile): Supports stereo music playing - AVRCP (Audio / Video Remote Control Profile): Music remote control (stop, play, previous, next)