... example mobile phone, PDA, laptops, headset etc l External microphone for hand-free conversation from mobile phones l Support ... Support A2DP and AVRCP Bluetooth profiles l Comfortable and adjustable headband with overhead designl Low Battery warningl Long ... echo cancellation and background noise reduction Bluetooth Profiles Supported: Headset, hands free, A2DP and AVRCP Frequency: 2400.0-2483.5MHZ ...