Yealink EHS40 - wireless headset adapter for wireless headset, VoIP phone - EHS40 - Headset Accessories - CDW.com
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Amazon.com: Standard 3.5mm Jack Smartphone Headset Adapter Cable Converter to RJ9 Plug for Cisco Unified Office Telephone 7970 7940 7941 7942 7971 etc : Electronics
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Headset Adapter Y Splitter 3.5mm Jack Cable with Separate Mic and Audio Headphone Connector for Gaming Headset, PS4, Xbox One, Notebook, Mobile Phone and Tablet - Walmart.com
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