[CANCEL THE NOISE] - Enjoy the larger-than-life music experience with the Auto Noise Cancellation (ANC) and Environmental Noise Cancellation (ENC) features of the Harmonics Twins 27 earbuds. Get better amplified audio output for crystal clear and crisp sound. [TRANSPARENCY MODE] - Switch on the mics of your earbuds to channelise the sound of your surroundings to the other side. All you need to do is double tap your earbuds and turn on the Transparency Mode.