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 Technology noise cancellation microphone delivers clear communication in noisy environments Microphone impedance: 2. 2k ohms Foam ear cushion for open, hear-through sound Adjustable headband for best fit Straight, single entry 8 foot cord CS95 microphone specifications Frequency Response 30-16,000 Hz Cord Straight, Single Entry, 8ft Plug 3. 5 mm Impedance 32 ohms Weight 2. 5 oz. Sensitivity 91 dB SPL/1mW Distortion Ear cushions open |