Pfeffer. Regardless how often I tried to put the headphone into pairing mode they would just turn off. The build quality is fantastic and the mic feels solid. I had them the following day delivered to my door by a very friendly young man. Multiple studies have shown it to be a known irritant that can cause allergic reactions. The shoes were very soft and comfy inside, however, I found that the front part was a bit small and didnt quite fit as Id like. This product is much better than the default ear buds that you receive with your Apple device. Love the material & the fact I can actually move around with it in. Would definitely recommend to anyone who has people try out their VR headset. But after 2 weeks the arent working correct you only hear music no talking.