According to the brand website, Marble is a registered trademark of Dongguan Marble Electronics Co., Ltd., which integrates the design, research and development, production and sales of earphone products and belongs to Hong Kong Marble Group. As a high-quality earphone manufacturer, Yunshi brand not only emphasizes exquisite electroacoustic technology and comfortable wearing experience, but also adheres to the fashion trend. Only with the concept of eternal quality, it strives to present all-round aesthetic feeling, and belongs to a high-grade earphone brand.