Comdio CH403A11 Corded Call Center Phone Headset with Comfort Fit Headband for NEC Aspire Nortel M2616 Plantronics A100 T10 T20 S11 Telecom Shoretel Avaya Hands-Free Telephone Superior quality sound with the flexible adjustable noise cancellation microphone. Most easy setup headset solution, Comfortable ear and mic cushions, Super Lightweight, Super Durable Direct connect over the head headset headphone, No additional amplifiers or adapters required. NO Mic Mute / Volume Control built in. SEE COMPATIBLE PHONE LIST IN DESCRIPTION, BUY THE ITEM TODAY IF YOU HAVE ONE OF THE PHONE MODELS LISTED BELOW.