Sennheiser MX-400B Dynamic Earbud Headphone (Discontinued by Manufacturer) Pair of lightweight earbuds for use with iPods, portable MP3 players, and more Full bass reproduction is optimized for rock, pop, and other bass-heavy genres 18 Hz to 20 kHz frequency response; total harmonic distortion of less than 1 percent Buds fit comfortably and securely in the ear; 3-foot OFC cable with 3.5 mm plug Phones weigh 0.21 ounces; 2-year warranty