JBL SYNCHROS E40BT Wireless Headphones 은 2014년 9월 19일에 처음 출시되었습니다. 205.00g의 무게를 지닌 우아한 블랙 디자인은 JBL SYNCHROS E40BT Wireless Headphones 을 아름답고 편안한 헤드폰으로 만듭니다. 이 버전의 JBL 헤드폰에는 블루투스 지원 3이 있습니다.
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