The Koss CS95 communication headsets boast a full range of sound that helps bring conversations to life. With high noise sensitivity and reduced sound distortion â€" not to mention hands-free communication via an electret noise cancelling microphone â€" serious multi-taskers can revel in the advantage offered by the CS95 single-sided headset. One foam ear cushion creates an open, hear-through sound. 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€" CS95 headsets offer long-lasting comfort to accommodate your communication needs. *Can be used with an external power source if sound card does not have built-in bias supply.