� Detachable USB cable + 3.5mm Jack

� With noise-cancelling microphone and detailed sound, every word comes through crisp and clear. It�s as if you�re having a face-to-face conversation

� Discreet boom arm design + Comfortable acoustic foam or soft leatherette ear pads

� Sennheiser HD stereo sound for calls or listening to music while working

� Unified Communications Optimised

SC 135 USB (single-sided) and SC 165 USB (double-sided) are headsets with 3.5 mm jack and detachable USB cable, optimized for UC professionals who value device flexibility, great sound, discreet modern style and comfort.