The lightweight SE-CLX40 headphones feature an ear direct mount structure and are padded with a soft silicone material which increases sealing and ensures excellent noise-isolation. Offering high clarity and powerful bass, the SE-CLX40 earphones are designed to provide optimum performance. They incorporate 10.5 mm drivers that deliver a playback frequency of 10 Hz to 24,000 Hz with an output level of 105 db.