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Plantronics Telephone Interface Cable Connects Your Telephone and Your Base | eBay
TYPE-C mobile phone interface Data Cable Liquid Silicone with Light Suitable for 3A Single-head Fast Charger Cable Tpe Material - AliExpress
Amazon.com: Earsinger Savi Cable 86009-01 86007-01(Connects Your Telephone and Your Base) Telephone Interface Cable is Compatible for CS500 SAVI 8200 700 W740 W745 MDA200 CS520 : Electronics
Amazon.com: Compatible Replacement Phone Cord for Plantronics CS500, Savi 700 and Savi 8200 Wireless Headsets (Connects Your Charging Base and Telephone) : Electronics