The Bluetooth USB dongle adds Bluetooth connectivity to your IP Phone with a wide variety of Bluetooth Headsets, allowing you to receive calls wherever you are in the office. Compatible with Bluetooth specification V4.0, back compatible with Bluetooth 1.1, 1.2, 2.0 and 3.0 for wide-ranging use. Supports Yealink T27G, T29G, T46G, T48G, T41S, T42S, T46S, T48S, T53