Great value for the money! Sennheiser has put a lot of technology into their PC151. The ear cups are designed to help block out background noise, to let you concentrate on what's going on INside! The noise canceling microphone with high speech intelligibility is perfect for gaming! Always be heard! Sennheiser has developed this headset for the ultimate gaming experience, with their special acoustics design and amazing high volume sound experience! Not only can you hear what the enemy is up to, but you can give our orders clearly, without blurring or fuzzing! This headset is also great for teleconferencing, telecommuting or talking with friends via internet telephone! Talk, listen and enjoy your time with friends and colleagues for long hours at a time with this headset designed for your needs! Adjustable headband and well-padded earcups that fit just right, for long hours of World of War or just talking! This a deal well worth the taking! Cord Length: 9.8 feet Headphone Frequency Response: 18Hz-22KHz Headphone Input Impedance: 32 ohm Headphone Sensitivity: 114dB S.P.L. at 1KHz Microphone Impedance: ~2K ohm Microphone Frequency Response: 80Hz-15KHz Microphone Sensitivity: -38 dBV/Pa Features: Noise cancelling microphone Microphone rest position Adjustable headband High power stereo headphones for prolonged use Single sided cable Closed-back ear capsules to reduce background interference Robust microphone with high speech intelligibility Internet telephony compatible Voice recognition In-line volume control and microphone mute switch Usable with CD/DVD/MP3 players Skype certified.