AKG K 319 In-Ear Bud Headphone - Dark Charcoal (Discontinued by Manufacturer) iPhone compatibility allows use with an iPhone without the need for an extra adapter. Wide dynamic range along with exceptional Super Bass response, makes the K319 the most powerful Lightweight, lanyard type design makes them virtually weightless so they are comfortable for everyday use. In-line volume control gives you complete control of your portable device's volume even with it tucked safely away. Included flight adapter makes them the perfect companion when flying