Insert the smaller 2.5 mm plug on the audio cable into the jack on the left earcup
Wearing your headphones
Use the slider to adjust the height
Rest the headband on top of your head to hold it in place
Conform the ear cushions snugly and comfortably around your ears with your ears completely inside the cushions to create an effective seal
Insert the other end of the audio cable securely into the audio output jack of the selected audio device