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ADAPT 660 Series from EPOS | Work wherever, whenever
Sennheiser MB 660 UC - Dual-Ear Headset with Noise-Canceling Microphone - Includes USB Bluetooth Dongle | Headphone Reviews and Discussion - Head-Fi.org
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MB 660 Series
EPOS Sennheiser ADAPT MB 660 Wireless Bluetooth USB Headset with boomless mic for MS Lync
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Sennheiser MB 660 UC MS Bluetooth ANC Headset Review - YouTube
Product Review: Sennheiser MB 660 UC | Modern Workplace and Collaboration