See also:

Lateral ventilation
▷ Thumbwheel for opening and closing the vents continuously, arrow 1. ▷ Lever for changing the air flow direction, arrow 2. ...

Replacing the battery
Replacing the battery 1. Take the integrated key out of the remote control. 2. Push in the catch with the key, arrow 1. 3. Remove the cover of the battery compartment; see arrow 2. 4. Insert ...

Tone
Only treble and bass can be set in the rear. The settings are made separately for the left and right headphones. Operation is the same as for the front tone. ...