About this item 15.4mm specially-tuned neodymium magnetic large dynamic driver with bass enhanced airflow channel design and double rear-cavity damping acoustic system. Precision-tuned front cover for enhanced sonic transparency, multi-pore acoustic design with waveguide channels. Sponge ear-tips with positioning limit design ensure greater comfort and stability. Snug and comfortable fit for deeper bass response. Modernist geometric design with two-color options. Dimensions: 6.85 x 3.35 x 1.06 inches.