Ultra Noise Canceling microphone reduces background noise pollution & provides a unique sense of privacy, even within the busy Call Center environment. Adjustable & pivotable microphone boom aids comfort & speech intelligibility. Switchable left or right microphone boom positioning allows personal adjustment for every wearer. Exchangeable ear pads provide enhanced standards of hygiene & extended wear. Active Anti-Shock in earpieces safeguards against acoustic shock & hearing impairment with prolonged use. Ergonomic design ensures comfort, even over many hours of use.