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, featuring a multi-pore acoustic design with waveguide channels. Sponge ear-tips with positioning limit design ensure greater comfort and stability. Provides a snug and comfortable fit with deeper bass response. Modernist geometric design available in two color options. Dimensions: 6.89 x 3.27 x 1.14 inches.