Call Center Hands-free Headset Headphone Polaris Monaural Mic Mircrophone Noice Cancelling + Extra Cushions for Cisco Telephone 7931 7940 7960 7970 7962 7975 7961 7971 7960 M12 M22 and 79xx Series Direct connect over the headset headset headphone. No additional amplifiers or adapters required. Superior quality sound with the flexible adjustable noise cancellation microphone. Most easy setup headset solution, Extra ear and mic cushions. Shirt clips included. NO Mute / Volume Control built in. NOT for Cisco Spa nor Avaya, Please see compatible list in description