Comdio H103VAA Corded RJ Headset with Flexible Noise Canceling Mic + Volume Mute Control for Aastra Nortel Nec Mitel ShoreTel Toshiba Siemens GE InterTel Sprint Talkswitch Office Telephone IP Phones ONLY WORKS FOR SOME SPECIFIC PHONES. SEE COMPATIBLE PHONE LIST IN DESCRIPTION, BUY THE ITEM TODAY IF YOU HAVE ONE OF THE PHONE MODELS LISTED BELOW. If you still can't find your phone model, please feel free to send email to us, and our headset experts will check the compatibility. Direct connect over the head headset, No additional amplifiers or adapters required, Most easy setup headset solution. Superior quality sound with the flexible adjustable noise cancellation microphone. Super Lightweight, Super Durable Headset with Comfortable ear and mic cushions. Professional Mic Mute / Volume Control built in.