Miao Yin hearing aid is an e-commerce product of Swiss Fengli brand, one of the six largest hearing aid brands in the world, and also the flagship product of Tmall Fengli flagship store. Now it has been sold independently as an online brand. Headquartered in Staffa, a suburb of Zurich, Switzerland, with more than 7,000 employees worldwide, Fengli Group is a multinational listed company specializing in the research, development, production and sales of high-tech hearing AIDS and FM wireless FM hearing AIDS.