To listen to your music without disturbing anyoneVery light, you can take it everywhere with you: at school, onholidays...•You can adjust the size so that it fits perfectly on your head!•Handy folding design: you can store it easily in your bag!•Frequency response: 20-20,000 Hz•Impedance (acoustic resistance): 32 ohm•Power output: 9mW x 3•Sensitivity: 85dB.Volume control to protect your ears!•Compatible with all audio and video players with headphonesjack output