2 Pack Connector to 3.5mm Headphone Earphone Extender Jack Adapter (White-2) 4 in 1 function: It not only supports charging and listening to music, but also supports remote control and microphones. Audio and charging can be synchronized. Support Listen Music + Charging + Phone Call + Microphone And Remote-On Headphones at the same time. Superior Charging speed and Sound quality: Using latest decoding chip to ensure fast charging (up to 2.1A power input) and long lasting usage. Copper wire core supports up to 48khz/24bit audio output, ensures the stability of transmission and offers Nondestructive digital sound quality. No App or additional software needed. Just plug your Phone 7 / 8 / X splitter in and you are ready to enjoy music with your headphone anytime, anywhere. Also it's easy to put it in your bag or pocket. Perfect design for Phone 7 / 7 Plus and Phone 8/ 8 Plus/ X , support OS 10.3 and above. If you have any problems,welcome to contact us.