Government certification ------ Yison has 25 years of production experience in the audio industry, has passed the test of the market, and has been recognized by the government, and has issued many certificates that recognize us.

Export certificate------In terms of export, we facilitate the import of customers, and in order to provide better export convenience, we apply for a new product export certificate every year.

Patent certificate------Yison has been in the audio industry for 25 years, independent research and development, independent design, independent mold opening, independent production, and obtained more than 50 patent certificates, and also received a lot of positive feedback from customers.