JBL Synchros S300A Premium On-Ear Headphones with Mic (Black/Blue)
Audio Cable wire Remote MIC For JBL S300 S300I S300a S400 S400BT S500 S700 Black | eBay
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 Cord
AUX Audio Jack To USB Charge Cable Adapter Cord for JBL Synchros S300 S300a | eBay
Best Buy: JBL Synchros S300a On-Ear Headphones White/Red SYNOE300AWNR