Conductor: Tinned Copper/Bare Copper

Connectors: Nickel/Gold plated

Super compatibility: iPhone 7/7 plus/5/5c/5s/se/6/6s/6 plus/6s/6s plus, iPad mini 2/mini 3/mini 4/air/air 2/iPad with Retina display/iPad pro(9.7-inch)/iPad pro(12.9-inch) iPod touch 6th gen, and audio equipment with 3.5mm aux ports.