USB -Mono (Monaural) Noise Canceling Microphone Inline Volume Mute Control 8 ft. Cable On-the-Ear Light Weight - for Education - Voice Recognition Speech Dictation Distance Learning - Command and Control - Internet Chat - Skype - Certified 6 Dragon rated. The Andrea NC-181VM USB Headset is an on-ear mono USB digital PC headset. The in-line volume/mute control allows you to easily adjust the speaker volume or mute your microphone. Andrea's Pureaudio USB technology bypasses your desktop or laptop computer's integrated sound system providing increased intelligibility and performance of microphone input and speaker output. The dual sided adjustable headband is designed to be durable while providing a stable and comfortable fit even for smaller heads. Andrea's high quality 40 mm speaker driver provides the best audio in an education headset. All Andrea USB headsets can take advantage of our free PC Audio Software which allows you to use AudioCommander to contol your audio and activate our patented noise cancellation filters for further enhanced audio. As with all Andrea headsets the NC-181VM USB Education headset incorporates Andrea's acoustic noise canceling microphone technology with an adjustable flex boom allowing for the ideal microphone location and resulting in the highest voice recognition ratings in the industry making all the Andrea headsets the best choice for speech accuracy voice recognition and speech intelligibility in the industry. Certified 6 Dragon rated