Unable to make operations for adjusting sound volume or for going to previous or next song.

The interval between each press may be too long when operating the multi-function button.
Press the multi-function button quickly so the button operations will be recognized as being consecutive.

NOTE: For consecutive button operations, press the multi-function button again within about 0.4 seconds.


How to operate

 [1] multi-function button

Play/pause: Press the multi-function button lightly.
Next song: Press the multi-function button 2 times consecutively.
Previous song: Press the multi-function button 3 times consecutively.
Increase volume: Press the multi-function button 2 times consecutively, holding the button down at the second push.
Decrease volume: Press the multi-function button 3 times consecutively, holding the button down at the third push.