Best-in-class Sound Quality]: 10.4mm+6mm dynamic dual driver, LHDC5.0 Bluetooth CODEC and high resolution certification makes the product best in its sound quality with deeper bass, delicate treble and clear vocals [Sliding Volume Control]: Slide on the surface of touch area of buds to adjust the volume.Sliding up increases the volume, while sliding down decreases the volume [49dB Adaptive Nosie Cancellation]: Advanced noise-cancelling technology,coupled with a high-performance chip,elevates the depth of noise cancellation upto 49dB.This reduces noise and blocks out chaos and allows users to enjoy music immersively