USB dongle for Bluetooth headsets, compatible with Yealink MP54 SfB Edition, MP54 Teams Edition, SIP-T46G, SIP-T48G, SIP-T41S, SIP-T42S, SIP-T46S, SIP-T48S, SIP-T53, SIP-T55A SfB, SIP-T55A Teams, SIP-T56A SfB and SIP-T56A Teams IP phone, supports answering and hanging up calls via Bluetooth, range up to 10 m, supports Bluetooth 4.1, backwards compatible with Bluetooth 1.1, 1.2, 2.0 and 3.0