Get a powerful, dynamic sound with big bass response custom-fit ear canal phones. An asymmetrical cable provides freedom of movement and the included carrying pouch avoids tangles in transit. Offering a powerful, bass-driven stereo sound with clarity and improved dynamics are the CX 300-II Precision Black ear-canal phones. The various sizes of ear adapters (S/M/L sizes) provided in the package allow for a personalised fit as well as a high passive attenuation of ambient noise.