• Over-the-hear
• Monaural
• Voice tube
• Adjustable fit
• lightest in its class
• Quick Disconnect feature provides walkaway convenience and compatibility with all Plantronics USB, desk phone audio processors, and direct connect cables
• This is a NON Noise canceling mic on headset, voice tube 
• Includes a CISCO compatible bottom cord for direct connection to their 69XX,79XX,8800,9000 series phones

Compatible Cisco phones:

6921 6941 6945 6961
7821 7841 7861
7931G 7940G 7941 7941G 7942G 7945 7945G 7960 7960G 7961 7961G 7965G 7970 7970G 7971G 7975G
8811 8841 8851 8861
8941 8945 8961
9951 9971