Coursin Dual Lightning Headphone Jack Adapter Audio and Charge Splitter for iPhone X/8/7 Perfect solution for charging your iPhone and listening to music at the same time. Using latest decoding chip to ensure fast charging. It is also compatible with the Lightning to 3.5mm Headphone Jack Adapter to work with your other headphones. Aluminum alloy oxidation shell is more wear-resisting and corrosion resistance. 100% Copper wire core which supports up to 48k HZ and 24-bit.