Single sided headphone with electret, noise cancellation microphone for hands-free communication from your personal computer Ideal for telephony, voice activated and voice recognition software and computer games with sound cards with built in bias supply* (*Can be used with an external power source if sound card does not have a built in bias supply) Dynamic element for extended frequency response Frequency Response: 30-16,000 Hz Clear Voice TechnologyTM noise cancellation microphone delivers clear communication in noisy environments
