What grade does Ruishengda hearing aid belong to?

International first line. According to the brand list of China, Ruishengda was founded in 1869, which is one of the top ten hearing aid brands and the first large multinational listed company engaged in communication, communication and hearing medical equipment in the world. 1. Dabei Group, the parent company of Ruishengda Hearing Group, was established on 1869. Is the world's first large multinational listed company engaged in communication, communication and hearing medical equipment. The main business of the group includes hearing AIDS, hearing testing equipment, Bluetooth headsets, etc. The products produced by Ruishengda Hearing Group and Dabei Communication Equipment, a subsidiary of Dabei Group, combine world-class acoustics and audiology technology, and rely on strong scientific and medical background, so that the products have many excellent analysis and sound processing functions. In speech signal processing, more users present real speech features. The extensive application of a number of advanced core technologies has made Dabei Group's products the best in the industry. Dabei Group is a high-tech company focusing on professional listening solutions and personal communication equipment. She is committed to making people's communication smoother and more comfortable with the world's top acoustics and audiology technology and strong IT scientific and technological achievements.