Phiaton PS 20 NC Active Noise Cancelling Earphones, Black Noise Blocker exclusive noise cancellation technology engineered by Phiaton blocks 95% of outside noise. EverPlay technology allows you to continue listening to your music even when the battery is depleted. Optimized active noise reduction for subways, traffic, and flights. Carefully balanced bass and treble equalization for enhanced sound quality. Compact size remote-control to accommodate your "on the go" style of living.