DW 20 USB ML is a single-sided DECT headset optimised for Microsoft Lync. Enjoy your calls in HD voice clarity and get natural high-definition sound for superior voice clarity. Work safe in the knowledge that the ActiveGard™ technology will protect your hearing. Imagine making every call in comfort, and being able to focus on what’s important: the conversation. The DW20 (DW Pro1) connects to both desk phone and softphone.