Touch [VOLUME] on the headphones lightly with the finger tip to adjust the volume.

Range of adjustment: 0 (minimum) to 40 (maximum)

Sliding the finger in the direction of / adjusts the volume to the next higher/lower level.

Sliding the finger in the direction and keeping the finger in place increases the volume level continuously in the range from 0 up to 25. The volume increases by one level at a time from level 26 to 40.

Sliding the finger in the direction and keeping the finger in place decreases the volume level continuously.