About this item High-Quality Sound: 10 mm drivers (20% larger than ordinary earphones) have a bio-cellulose diaphragm to produce high-detail treble with superior clarity. Switch on BassUp mode for up to 70% more bass. Clear Calls with cVc 8.0 Noise Reduction Technology: Your voice is picked up and enhanced while background noise is effectively suppressed to ensure you’re heard in exceptional clarity even if you’re in a noisy environment.