About this item Unique design with a fully transparent and small shell, it is exquisite and full of geek flavors. Powerful composite magnetic micro diaphragm dynamic driver. Unbelievable amplitude frequency response curve - after two years of repeated adjustments, this product achieves incredible performance with a closed structure. It has a frequency response curve that aligns well with HRTF (head-related transfer function), bringing a natural and open sound field. Moderate bass gain enhances the musicality, creating a fuller ambient sound. Industrial design - The appearance and structural design reflect meticulous craftsmanship, with a compact size that allows for versatile wear options. The fully transparent cavity provides a clear view of the driver and acoustic structure. Simple and unique appearance. Patented anti-blocking sound damping and double damping structure. Dimensions: 3.31 x 3.27 x 1.65 inches.