Other features: - Bluetooth 4.1- Range up to 10 m- Support for A2DP, AVRCP, HSP, HFD- Talk time / music up to 5 hours- Standby time up to 180 hoursA2DP (Advanced Audio Distribution Profile)Allows you to transmit stereo sound signals. (Much better quality than mono coding used in HSP and HFP profiles).AVRCP (Audio / Video Remote Control Profile)Used to send commands (such as skip forward, pause, play) from the control device (eg stereo headset) to the target device (for example, a computer with a media player).