JBL SYNCHROS E40BT Wireless Headphones sono state rilasciate per la prima volta il 19 settembre 2014. L'elegante design nero con un peso di 205,00 g rende le JBL SYNCHROS E40BT Wireless Headphones un paio di cuffie belle e comode. Questa versione delle cuffie JBL ha il supporto Bluetooth 3.
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