To Wear it Over the Head:
Make sure that the headband is snapped into the side of the ear piece, and place the cushion with rubber ring over the ear piece. Then adjust the band to fit your head.
To Wear it Over your Ear:
First, take the headband and the cushion with rubber ring off of the ear piece. Then place the extra pivot ball ring on the ear piece, aligning the pivot ball with the microphone boom. Insert the ear loop into either side of the pivot ball ring (depending on which side you choose to wear it). Rotating the pivot ball ring may improve your fit.
Note: The ear cushion cannot be worn in the over-the-ear style. However, the headset will not be under any under pressure when worn this way, and the ear cushion should not be necessary.
For illustrations, please see the attached documents below.