First custom earphone in the world with a single 14mm dynamic driver couples with advanced frequency suppression technology (FST). Frequency Response: 10-20000 Hz Impedance：16ohms（including cable） Sensitivity (at 1kHz)：116dB spl (1mW) Important: Due to the size of the driver, people with small ears may not be able to fit. We would need your ear impressions to check for sizes...
Listen to your iPod 2G Shuffle with this comfortable, lightweight headphone with iPod type earbuds, supported on the back of the head, easy to use controls, no dangling wires, perfect for runners, skiers, workouts. Also very comfortable under helmets. Shuffle player not included in purchase.