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ELELAB01MG5DSPS Sennheiser MB 660 MS (507093) - Dual-Sided, Dual-Connectivity, Wireless, Bluetooth, Adaptive ANC Over-Ear Headset | For Desk/Cel
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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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OMNIHIL Replacement 30ft 3.5mm Headset Audio AUX Extension Cable for Sennheiser MB 660 UC MS Wireless Headset - Walmart.com
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