Adjusting Caller and Listener Volume with the Bluetooth Phone.
You can adjust the input and output volume of your calls.
Input Volume
If you have trouble hearing the person who is talking to you, turn this volume option up. If the person's voice is too loud, turn this option down.
Output Volume
If the other person is having trouble hearing you, turn this option up. If the other person says your voice is too loud, turn this option down.
Bluetooth Beep Output
When turned on, this sends output beeps to alert the person on the other end of the phone that the device user is composing a message.