Koss CS80 communication headsets deliver a full range of sound that brings your favorite games to life. Ideal for all multimedia applications, these are equipped with Clear Voice Technology in the form of a noise cancelling microphone that brings clear, hands-free communication to noisy environments. With crisp, clear sound pouring through the CS80â€™s comfy ear cushions, technology reduces sound distortion, while ensuring what you hear is what you want to hear: nothing but the premium Sound of Koss. Whether you employ telephony, voice-activated, or voice recognition software â€" or indulge in computer games with sound cards that feature built-in bias supply* â€" CS80 headsets offer long-lasting comfort to accommodate evening gaming sessions that turn into all-nighters. *Can be used with an external power source if sound card does not have built-in bias supply.