Sennheiser SC 660 USB ML is a premium dual-sided USB stereo headset optimized for Skype for Business. Offering Sennheiser voice clarity and ultra-noise canceling microphone it optimizes speech intelligibility in noisy environments. SC 660 USB ML delivers great functionality and convenience with integrated call-control unit and USB connector. Stainless steel and brushed aluminum parts create an iconic high-end design that enhances strength and robustness. Features include leatherette ear-pads for powerful sound and wearing comfort and Sennheiser ActiveGard acoustic shock prevention. SC 660 USB ML is designed for quality-conscious enterprises using Microsoft Lync requiring Sennheiser voice clarity, extreme durability and wearing comfort.