Your 2-Pack SportBuds include TWO ultra-lightweight in-the-ear earbuds for music on the go. This dual portable stereophone unit includes a see-through, compact, wind-up spool carrying case for easy storage and protection when not in use. A 4-foot straight cord and L plug provide flexibility and reliability for active use. For all portable audio and video devices, MP3, CD and DVD players. Specifications: Frequency Response: 80-20,000 Hz, Impedance: 32 ohms, Sensitivity: 82 dB SPL/1mW, Distortion: <1%, Cord: Straight, Dual Entry, 4ft.