Listening to Music While Charging: Function Audio + Charge port of our headphone adapter, let you enjoy the fun of listening to music while charging. It can also be applied to Home audio and Car. Efficient Transmission & Stable Signal.You just need to plug and enjoy much clear and fidelity sound quality. Portable Design: The 3.5mm Jack adapter is small and portable, easy to put it in your bag or pocket. It doesn't require additional audio software, just enjoy music with your favorite 3.5mm headphone at any time. Efficient TransmissionAudio cable is built with upgraded chip to read data fast and ensure the stability and fidelity of sound transmission, giving you a fantastic music trip and experience when using this aux cord. Compatible Devices : HeadphoneNumber of Ports: 2