Replacement USB Charging Cable for JBL Synchros E40BT/E50BT/J56BT Headphones 2.5mm – Ancable
USB Charger Power Cable Cord For JBL Synchros E40BT E50BT J56BT S400BT Headphone | eBay
Amazon.com: Replacement Charging Power Supply Cable Cord Line for JBL Synchros E40BT E50BT J56BT S400BT S700 Headphones (Black) : Electronics
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USB to 2.5mm Male AUX Audio Jack Charging Cable Adapter Cord for JBL Synchros S300 S300I S300a S400BT J56BT E40BT E30 E40 E50 - Walmart.com
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Aux Cable 3.5mm To 2.5mm Audio Cable Jack 3.5 To 2.5 Headset Cord Replacement Cable for JBL E50BT J56BT S400BT S700 - Newegg.com
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USB Charger Cable to 2.5mm Adapter For JBL Synchros E40BT E50BT S700 H – Magconn