Wantek Wired Call Center Telephone Headset Headphone with Mic for NEC Aspire DT300 DSX Polycom 335 400 Avaya 1416 Aastra 6757i Mitel 5330 ShoreTel IP230 IP Phones(H110S01A)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Only works for some specific phones with Standard Modular RJ Headset Port. SEE COMPATIBLE PHONE LIST IN DESCRIPTION， BUY THE ITEM ONLY IF YOU HAVE ONE OF THE PHONE MODELS LISTED BELOW. </span></li><li><span class="a-list-item"> Direct connect headband telephone headset headphone， No additional amplifiers or adapters required. </span></li><li><span class="a-list-item"> Superior Call Center quality sound headset with flexible adjustable noise canceling microphone. </span></li><li><span class="a-list-item"> Super Lightweight， Super Durable Headset with Comfortable ear and mic cushions for all day use. </span></li><li><span class="a-list-item"> NO Mic Mute &amp; Volume Control built in. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41nvy-ODZ7L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51TNLOuOh1L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51VmL2iDw-L.jpg" noproxy>