These earbuds by Bose, renowned audio pioneers, can be used with any portable audio device and provide natural, lifelike sound reproduction and greater low-frequency output, resulting in high-quality audio that has more fullness, range, and clarity than conventional earbuds. The earbuds come with three pairs of different-sized, molded removable silicone tips that allow you to choose one for optimal comfort and fit, unlike common one-size-fits-all earbuds. A protective carrying case keeps the 49" cord organized and protects it during travel. A built-in cord adjuster allows you to control slack to keep the cord from tangling during relaxed listening or active workouts. Available for delivery only in the United States.