Mountainsmith Apex 100 Internal Frame Backpack Multi-function: You will be able to charge your and listen to music with a headphone or earphone at the same time ( Please be noted:Our 2 in 1 Adapter does not support music control and phone calls control ) Efficient transmission and stable signal : 100% Copper wire core offers Nondestructive digital sound quality and ensure the stability of the transmission. You just need to plug and enjoy much clear and fidelity sound quality High-quality material to ensure charging speed: Using high-tech materials imported from Japan to make sure long lasting using and fast charging. Original ABS and PC design:Much compatible with apples original cable and headphone as the gloss white appearance,enhance the smooth feeling.You can put it into a backpack or handbag relievedly if you often go out. What you get: ebasy 2 in 1 to 3.5 mm audio adapter ( White ) , 1-year manufactuers warranty