Replacement Headphone Cable -Audio Extension Music Cord for -JBL S400BT Headset | eBay
1 Pair Replacement Ear Pads Cushion Cover For Jbl Synchros E40bt E40 S400 S400bt Headphone Pu Leather Earpads Cups Repair Parts - Protective Sleeve - AliExpress
Case for Jabra Revo, JBL S400BT, JBL E45BT, JBL E55BT, Marshall Major II Bluetooth On-Ear, Marshall Monitor Bluetooth Wireless Over-Ear, Marshall MID Bluetooth, Beats Studio, Skullcandy Crusher - Walmart.com
JBL Synchros S400BT review | TechRadar
JBL Synchros S400BT Review | PCMag
2X USB to 2.5mm Audio Charging Cable for JBL S400BT J56BT E40BT E30 Headphones | eBay