Sennheiser PC 161 product# S1-PC161 The PC 161 is an over the head binaural headset. The ultimate open back gaming headset providing unparalleled audio performance. Key Feature Open speaker system for true to life sound Extra large ear cups for ensured comfort and stability Ideal for gaming Robust microphone for high speech intelligibility Unique 3D, 360 degree surround sound Noise cancelling Suitable for Internet telephony and VOIP applications extra thick, single sided cable Voice recognition In-line volume control and microphone mute switch Usable with CD/DVD/MP3 players Skype certified