Rosewill 3.5mm Connector Circumaural Headset (RHM-556) Equipped with 40mm special Mylar Cone Speakers, the Rosewill RHM-556 headset produces vibrant sound with deep bass for a rich listening experience The Rosewill RHM-556 features a hidden mic so you can concentrate on your speech instead of adjusting or twisting the mic for an optimized position The special structure can fold the headset into a small foot ball for easy portability