Audio-Technica ATHCK7 titanium earphones In-ear design forms an acoustic seal that achieves outstanding sound isolation, blocking background noise, preventing sound leakage and allowing for increased fidelity at lower volume levels 11 mm drivers deliver deep bass, extended treble and high fidelity Rare-earth neodymium magnets at the heart of the drivers offer maximum sound quality in minimum size Titanium construction for durability, light weight, and portability Ideal for use with all audio sources, including MP3 and other portable players In-ear design forms an acoustic seal that achieves outstanding sound isolation 11 mm drivers deliver deep bass, extended treble and high fidelity Rare-earth neodymium magnets at the heart of the drivers offer maximum sound quality in minimum size Titanium construction for durability, light weight, and portability Ideal for use with all audio sources, including MP3 and other portable players In-ear design forms an acoustic seal that achieves outstanding sound isolation, blocking background noise