importANT NOTE -- First step plug your headphones to this product, then connect with iPhone. Reversed steps will not make product work correctly.Charge & Music -- Designed for iPhone X/ 8/ 8Plus/ 7/ 7Plus, Dual-Lightning splitter allows to use Lightning headphone and charge at the same time.Perfect with All Headphones -- Supports microphone and remote on Apple Lightning Headphones. Also supports Lightning to 3.5 mm Headphone Jack Adapter.Impressive Sound Quality -- Up to 48 KHz and 24-bit audio output, keep your original headphone sound quality. Also supports 3.5mm AUX in the car.