Description This adaptor has a built- card, with which you could easily use the USB port of your PC for audio transmission. It has been optimized for both microphone and earphone. With the buttons on it you could easily turn up and down the volumn. The efforts and fine craftsmanship we put into the making of this product make for superior reliability. Manufactured with the purpose of durability, this product would spend eminently long period of time with you. Features -Color: Black. -Material: Aluminum alloy. -Size: 19x1.5x0.8cm/ 7.48x0.59x0.31inches. -This adaptor has a built- card, with which you could easily use the USB port of your PC for audio transmission. -It has been optimized for both microphone and earphone. -With the buttons on it you could easily turn up and down the volumn. -The efforts and fine craftsmanship we put into the making of this product make for superior reliability. -Manufactured with the purpose of durability, this product would spend eminently long period of time with you. This adaptor has a built- card, with which you could easily use the USB port of your PC for audio transmission. It has been optimized for both microphone and earphone. With the buttons on it you could easily turn up and down the volumn. The efforts and fine craftsmanship we put into the making of this product make for superior reliability. Manufactured with the purpose of durability, this product would spend eminently long period of time with you.