Shenzhen HuaLong YuYin Technologies Co.,Ltd was established in August, 2002. We specialize in the design and production of any kind of speakers. Our company has established inside quality control system according to ISO9002 standard since 2002. We have a high-quality and specialized management team, train our staff members with "5S"system every day, and strictly follow ISO9002 system. Adhering to the principle of "Quality First, People First", we offer the most high-quality products and service to customers actively. Our corporate culture and brand have been shaped.