The Sennheiser IE 4 Earphones provide a natural high quality sound full of character and high dynamic. The in-ear earphones are designed for wireless monitor applications and offer outstanding resistance to outside noise. The IE 4 earphones include three exchangeable ear sleeves for an optimal fit. With high resistance to environmental noise interchangeable sleeves and a fantastic bass response the earphones are a great choice for long listening sessions. Included with the IE 4 earphones is an EVA plastic SubZero earphone case for easy transport and storage.