HEAR BETTER - Fine-tuned 30 mm audio drivers deliver enhanced digital audio for meetings, music, and more. FIT BETTER - Adjustable headband features swivel-mounted, leatherette ear cushions for hours of comfort. SOUND BETTER - H390 minimizes unwanted background noise for clear conversations. The rigid, left-side mic can be positioned for better voice capture. A rotating boom can be tucked out of the way when not in use.