Founded in 2002, TDA is a self-registered brand in China. The company is currently implementing IATF16949 and ISO13485 quality management systems. By December 2022, TDA will have 4 production factories in Changzhou, Nantong, Chongqing, and Qingdao. The company's current main customers include B/S/H, Panasonic, GEA, Audi, Haier, etc. The company mainly produces various electroacoustic devices and injection molding parts, including various buzzers, car speakers, 5G speakers, coil speakers, microphones, etc. It has several independent research and development patent projects, among which piezoelectric speakers are used in many special fields due to their ultra-thin features. The products are mainly used in various home appliances, automobiles, security, medical and other industries. The company has self-supporting import and export rights, and its products are mainly exported to Europe and North America. The products meet the EU RoHS and REACH standards.