The Koss P15 lightens the load with a portable earbud and carrying case that travels light and hands free. The ideal accessory for portable and replacement users, the P15 earbud is ultra-lightweight and features an electro/dynamic element for an extended frequency response of 40-20,000 Hz. A 4-foot straight cord and L-plug provide flexibility and reliability for active use. In addition to the stereo earbud, the P15 includes a wind-up spool carrying case with flexible, rubber-like wrap-around strap for protective storage and convenient portability. The perfect fashion accessory, the P15 dangles from any wrist, belt loop or shoe tie.The P15 Stereophone is covered by Koss’ No-Questions-Asked Lifetime Warranty.