11.2Learn about simultaneous use for voice and audio
Your Bluetooth stereo headset can connect to
•one Bluetooth audio device (supporting the A2DP and AVRCP Bluetooth profile) and
•one Bluetooth communication device (supporting HFP or HSP Bluetooth profile) at the same time.
Therefore you can connect your Bluetooth stereo headset
•with a Bluetooth stereo enabled phone to both listen to music and lead calls, or
•with a Bluetooth phone that does not support Bluetooth stereo (A2DP) to lead calls and at the same time to a Bluetooth audio device (Bluetooth enabled MP3 player, Bluetooth audio adapter etc.) to listen to music. Make sure to pair the phone first with your Bluetooth headset, then turn both the phone and headset off to then pair the Bluetooth audio device.
With the SwitchStream feature you can listen to music and monitor your calls at the same time. Even while listening to music, you will hear a ring tone when receiving a call and can switch to the call simply by tapping the 
button.
11.3Learn about FullSound
FullSound is a smart digital sound enhancement algorithm, which runs on a powerful processor inside your Bluetooth headset.
It restores and enhances bass, treble, stereo effects and dynamics of compressed music and leads to a more natural,“real life” sound experience based on years of acoustic research and tuning.
The FullSound feature decreases music playing time by less than 10% if activated. The feature is activated when you buy the product, to turn FullSound off or on hold 
and 
simultaneously for 4 seconds.You will hear one short beep after turning FullSound on, and two short beeps after turning FullSound off.
11. 4 Automatic power saving
If your headset cannot find any Bluetooth device to connect to in range within five minutes it will automatically power down to save battery life.
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