With excellent sound quality and first class active noise-canceling, these earphones enable you to enjoy your music on the move without having to raise the volume in noisy places such as the tube, trains, buses and airplanes. These earphones are equipped with a microphone that picks up ambient noise and shuts out up to 90%. A handy ‘monitor’ button temporarily turns off the noise-canceling effect to enable you to hear your surroundings when needed.