https://electronics.woot.com/offers/apple-appaccmu7e2ama-apple-usb-c-to-3-5-mm-headphon Apple USB-C to 3.5 mm Headphone Jack Adapter (MW2Q3AM/A) for $6.99. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.