This product is an earphone compatible with high-resolution audio, using a brass material for its driver case and housing. The use of a high-rigidity brass driver reduces excess vibration. The world's first tone hole structure, with a hole in the front-mounted magnet on the center axis of the driver, achieves smooth response over a wide range from low tones to high tones. Brass instruments suggestive of ornaments are adopted as a motif, representing an expectation for high sound quality.