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 und SIP-T56A Teams IP phones, Supports call answering and ending via Bluetooth Up to 10 m range, Supports Bluetooth 4.1, backwards compatible with Bluetooth 1.1, 1.2, 2.0 and 3.0