The EPOS l Sennheiser SC 165 USB Wires Binaural Headset with 3.5mm Jack and USB Connectivity is a double-sided headset with 3.5 mm jack and detachable USB cable, optimized for flexible UC professionals working on both PC and mobile devices. This headset has a bendable boom arm that can fold discreetly into the headband when not in use, giving a more streamlined appearance. Experience a natural listening experience with the Sennheiser Voice Clarity and noise-cancelling microphone optimize speech intelligibility and an in-line call control unit enables seamless call management.