The Sennheiser MB 660 UC MS is a wireless, Skype for Business Certified, adaptive ANC headset designed for knowledge workers demanding business-grade communication and premium Sennheiser sound quality for maximum productivity in open offices. Sennheiser’s NoiseGard™ hybrid adaptive active noise cancellation technology adjusts to ambient noise to provide the most comfortable listening experience. This allows users to reclaim their office as a disruption-free workspace. SpeakFocus™ technology with 3 dig-ital microphones and other advanced microphone technologies deliver best-in-class voice clarity and optimized speech intelligibility. Pillow-soft leather ear pads provide lasting comfort and a choice of sound effect modes deliver a personalized listening experience for multimedia and mu-sic - with up to 30 hours operating time.