The t29gn dual port gigabit executive ip phone offers a high resolution tft colour display and optima hd technology delivering a rich visual and audio experience along with a very user friendly interface as well as support for corded and wireless headsets the t29gn also incorporates a usb port allowing bluetooth headsets to be connected using a yealink bt40 bluetooth dongle and up to 6 expansion modules making this an attractivce and feature rich handset