How to enter pairing mode on your ADAPT 660 - YouTube
EPOS Headsets | EPOS Sennheiser Singapore | EPOS Sennheiser ADAPT 660 Over-Ear Bluetooth ANC Headset With BTD 800 USB Dongle And Carry Case (1000200)
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Amazon.com: EPOS | SENNHEISER Adapt 660 (1000200) - Dual-Sided, Dual-Connectivity, Wireless, Bluetooth, ANC Over-Ear Headset | for Desk/Cell Phone & Softphone | Teams Certified (Black), 207 mm x 65 mm x 181 mm : Electronics
IMPACT 600
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Sennheiser / EPOS ADAPT 660 Over-Ear Bluetooth Headset Black
EPOS ADAPT 660 1000200
EPOS | SENNHEISER ADAPT 660, EP-1000200 | Your Communication Partner