JBL SYNCHROS E40BT Wireless Headphones foram lançados pela primeira vez em 19 de setembro de 2014. O elegante design preto com um peso de 205,00g torna os fones de JBL SYNCHROS E40BT Wireless Headphones um belo e confortável par de fones de ouvido. Esta versão dos fones JBL possui suporte a bluetooth 3.
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