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Sennheiser MB 660 UC (507092) - Dual-Connectivity, Wireless, Bluetooth, Foldable, Adaptive ANC Over-Ear Headset | For Desk/Mobile Phone & Softphone/PC Connection | UC Platform Compatibility (Black) : Electronics - Amazon.com
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Sennheiser PXC 550-II Wireless - NoiseGard Adaptive Noise Cancelling, Bluetooth Headphone with Touch Sensitive Control and 30-Hour Battery Life (508337) - Newegg.com
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Synergy Digital Wireless Headset Battery, Compatible with Sennheiser MB 660 Wireless Headset, (Li-Pol, 3.7V, 650mAh) Ultra High Capacity, Replacement for Sennheiser AHB413645PCT Battery - Walmart.com
![Sennheiser MB 660 UC (507092) - Dual-Connectivity, Wireless, Bluetooth, Foldable, Adaptive ANC Over-Ear Headset | For Desk/Mobile Phone & Softphone/PC Connection | UC Platform Compatibility (Black) : Electronics - Amazon.com Sennheiser MB 660 UC (507092) - Dual-Connectivity, Wireless, Bluetooth, Foldable, Adaptive ANC Over-Ear Headset | For Desk/Mobile Phone & Softphone/PC Connection | UC Platform Compatibility (Black) : Electronics - Amazon.com](https://m.media-amazon.com/images/I/41TDn7cjKVL._AC_SY350_.jpg)
Sennheiser MB 660 UC (507092) - Dual-Connectivity, Wireless, Bluetooth, Foldable, Adaptive ANC Over-Ear Headset | For Desk/Mobile Phone & Softphone/PC Connection | UC Platform Compatibility (Black) : Electronics - Amazon.com
![Synergy Digital Wireless Headset Battery, Compatible with Sennheiser MB 660 Wireless Headset, (Li-Pol, 3.7V, 650mAh) Ultra High Capacity, Replacement for Sennheiser AHB413645PCT Battery - Walmart.com Synergy Digital Wireless Headset Battery, Compatible with Sennheiser MB 660 Wireless Headset, (Li-Pol, 3.7V, 650mAh) Ultra High Capacity, Replacement for Sennheiser AHB413645PCT Battery - Walmart.com](https://i5.walmartimages.com/asr/a4f40dd2-0829-4296-ba83-87f791af932e.074183a5b394ce0786f1ad84c923c6fc.jpeg)
Synergy Digital Wireless Headset Battery, Compatible with Sennheiser MB 660 Wireless Headset, (Li-Pol, 3.7V, 650mAh) Ultra High Capacity, Replacement for Sennheiser AHB413645PCT Battery - Walmart.com
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Amazon.com: Sennheiser MB 660 UC (507092) - Dual-Connectivity, Wireless, Bluetooth, Foldable, Adaptive ANC Over-Ear Headset | For Desk/Mobile Phone & Softphone/PC Connection | UC Platform Compatibility (Black) : Electronics
![Synergy Digital Wireless Headset Battery, Compatible with Sennheiser MB 660 Wireless Headset, (Li-Pol, 3.7V, 650mAh) Ultra High Capacity, Replacement for Sennheiser AHB413645PCT Battery - Walmart.com Synergy Digital Wireless Headset Battery, Compatible with Sennheiser MB 660 Wireless Headset, (Li-Pol, 3.7V, 650mAh) Ultra High Capacity, Replacement for Sennheiser AHB413645PCT Battery - Walmart.com](https://i5.walmartimages.com/asr/2635efed-e973-49b6-8ddc-0ba25cffa537.7c96f4a3c752eb3eae32832003246d51.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)