HQRP 3.5mm to 2.5mm Audio Cable for JBL Synchros S400BT, Synchros E40BT Bluetooth Headphones Replacement + HQRP Coaster - Walmart.com
Amazon.com: 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 :
Replacement USB Charging Cable for JBL Synchros E40BT/E50BT/J56BT Headphones 2.5mm – Ancable