A PC/USB Adapter that allows users to use their headsets with a PC/Computer softphone (like Microsoft Skype for Business) - The APU-76 is compatible with CS500 series wireless headsets (CS510 CS520 CS530 CS540 C054 C052). Also compatible with the Mitel 6867 and Mitel 6869 HID1 desk phones - Compatible with Yealink SIP-T58V SIP-T58A SIP-T56A - Based on V83 - Compatible with Yealink SIP-T54S SIP-T52S SIP-T48S SIP-T46S SIP-T42S SIP-T41S SIP-T53 SIP-T53W SIP-T54W SIP-T57W - Based on V84
