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JBL E50BT user manual (English - 22 pages)
Replacement USB Charging Cable for JBL Synchros E40BT/E50BT/J56BT Headphones 2.5mm – Ancable
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vhbw USB Jack Charger Cable compatible with JBL Synchros E50BT, E50, E40BT, E40, J56, J56BT Headphones - USB to AUX Jack Plug - Revised Version : Amazon.co.uk: Electronics & Photo
Synchros E50BT | Bluetooth®, around-ear wireless headphones with ShareMe™ music
2.5mm USB CHARGING Charger Cable For JBL Synchros E40BT/E50BT Headphones J56BT | eBay