Product Information:1: The product supports Apple 7 / 7plus headphone jack conversion. 2: 3.5mm 4 pin jack to DC headset. 3: The product is only valid for 7 / 7plus mobile phones. 4: Support all functions of the mobile headset. 5: line length 10CMPacking list: 2 * Headphone Adapters [2 in 1 function]: [Music charging], you can listen to music, watch videos and play with headphones while charging. It supports 48kHz, 24bit audio output and high fidelity audio output to provide perfect sound quality experience. [High quality]: It can realize fast and stable signal transmission and lossless digital sound quality. The high-quality aluminum alloy oxidized shell is more wear-resistant and corrosion-resistant and improves the ability to suppress disturbance. Enjoy clear and comfortable sound quality and fast charging experience. [Perfect Compatibility]: Suitable for iPhone 7/7 Plus devices. [Plug and Play]: The adapter uses high quality ABS material (the latest version of the chip used to make it). Exquisite and compact appearance. It's easy to carry. If you go out frequently, you can put it in a backpack or handbag. The trend of music lovers is the first choice. Recommended gifts for family and friends.