Built in high-performance earphone drivers for extended frequency range, lower distortion, high performance and noise isolating ear bud tips eliminate ambient noise Noise Isolation: The earbuds eliminate outside noise to keep your music crystal clear. The in ear design reduces background noise and sound leakage significantly, while achieving high definition music playback. Listen your favorite tracks during work and travel Portable Comfort : Easy to slip in your pocket or backpack, comes with 3 sizes of silicon earbuds and will stay in place when you re on the move. The BS10 also includes a cable clip for ultimate comfort. Take them with you everywhere you go Betron BS10 earphones include metal housing and a no tangle reinforced cable, making them more durable. Good sound starts with signal quality, the BS10 earphones comes with a gold plated audio connector to deliver the signal on max definition Easy to slip in your pocket or backpack, these earphones also come with a convenient carry case. The compact and functional hard case keeps items safe and portable