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SYNCHROS S400BT
Amazon.com: USB to 2.5mm Male, Ancable Headphone Charger Cable for JBL Synchros E30 E40BT E45BT E50BT EB40 S400BT S400 S500 S700 J56BT Wireless Headphones Replacement Charging Cable : Electronics
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JBL Synchros S400BT Review | SoundVisionReview
JBL Synchros S400BT review | TechRadar
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