JBL Synchros S300 Premium On-Ear Headphones for iOS with built-in remote/Microphone - White/Blue Headphones & Accessories - Newegg.com
Eartlogis Replacement Ear Pads For Jbl Synchros S300 S 300 S-300 Headset Parts Earmuff Cover Cushion Cups Pillow - Earphone Accessories - AliExpress
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