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 :
2X USB to 2.5mm Audio Charging Cable Cord for JBL Synchros S300 S300I – Magconn
Amazon.com: SCOVEE USB to 2.5mm Male AUX Audio Jack Charging Cable for JBL Synchros S300 S300I S300a S400BT J56BT E40BT E30 E40 E50BT S500 S700 Headphones Stereo Power Wire for JBL Charger
10FT 2.5mm Audio Cable Cord Aux for JBL Synchros S300 S500 S700 S400BT Headphone | eBay
AUX Audio Jack To USB Charge Cable Adapter Cord for JBL Synchros S300 S300a | eBay
Amazon.com: SCOVEE USB to 2.5mm Male AUX Audio Jack Charging Cable for JBL Synchros S300 S300I S300a S400BT J56BT E40BT E30 E40 E50BT S500 S700 Headphones Stereo Power Wire for JBL Charger
Poyatu Repair Cable For Jbl Everest 300 E40bt E50bt E45bt E55bt Jbl Synchros S300 S500 S700 Headphone Cable With Mic - Audio & Video Cables - AliExpress
Audio Cable With Mic Remote For JBL Synchros S500 S700 S300 S400BT E45BT E50BT E55BT E30 E35 E40BT E500BT C45BT Headphones|cable for headphones|cable headphoneaudio mic - AliExpress
Audio Cable with mic For JBL Synchros S500 S700 S300 S400BT 500BT headphones | eBay