The PC 151 Stereo headset provides ultimate real-life sound to make it seem like your sitting right in the middle of the action. These great headphones have an adjustable headband, to fit perfectly regardless of head size. The Sennheiser PC151 Stereo headset also incorporates a noise-canceling microphone into the design. Keep in touch with friends while gaming, or even issue voice commands. The noise canceling technology provides high speech clarity and voice recognition because of advanced sound filtering. The Sennheiser PC151 Stereo headset features in-line volume control and a microphone mute switch. No more disturbing those around you or broadcasting private conversations over the net! These stereo headphones have a single sided cable connection for maximum freedom of movement.