Can you use two headphones on a iPhone 6 via lightning? - YouTube
2 Pack-Apple Headphones Wired with Microphone Earbuds,in-Ear Earphones Built-in Call Control and Clear Audio Compatible with iPhone 6/6Plus/Android/iPad/MP3/Laptop and Most 3.5mm Plug - Walmart.com
Amazon.com: 2 Packs-Apple Earbuds Wired iPhone Headphones with 3.5mm Plug [ Apple MFi Certified] with Built-in Microphone & Volume Control Compatible with iPhone,iPad,iPod,PC,Android Most 3.5mm Audio Devices
THD and jitter: Apple's Lightning to 3,5 mm Headphone Adapter VS iPhone 6 — ohm image
New Earphones Headphones For iPhone 6s/ 6/ 5c/ 5 5S/ 5SE/ iPad Handsfr– Compas Shopping
Amazon.com: 2 Pack Wired Apple Earbuds/iPhone Headphones/Earphones with 3.5mm Wired[Apple MFi Certified] with Mic, Volume Control Compatible with iPhone,iPad,iPod,Computer,MP3/4,Android Most 3.5mm Audio Devices : Electronics
Apple kills the last iPhones with headphone jacks, nixes free adapters too - CNET
Official Apple iPhone 6 EarPods with 3.5mm Headphone Plug - White