Black Audio AUX Cable For JBL SYNCHROS E40BT E30 E40 E50BT S400BT headphones | eBay
Headphone Charger Cable, Ancable 6ft USB to 2.5mm Stereo Jack Male Charging Cable for JBL Synchros E30 E40BT E45BT E50BT EB40 S400BT S400 S500 S700 J56BT Bluetooth Headphones 2.5mm Male Cable : Electronics - Amazon.com
JBL Synchros E40BT Repair - iFixit
USB Charger Power Cable Cord For JBL Synchros E40BT E50BT J56BT S400BT Headphone | eBay