With the iPhone 7 and newer models, the 3.5mm headphone jack no longer exists. This adapter allows you to connect devices that use 3.5mm audio plugs
Apple Lightning to 3.5 mm Headphone Jack Adapter
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Lightning to 3.5 mm headphone jack adapter for iPhone 7 headphones
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Apple Lightning to 3.5 mm Headphone Jack Adapter
Lightning to 3.5 mm headphone jack adapter for iPhone 7 headphones