Betasray is better than the top ten domestic brands. According to relevant public information, the main brand (Betasray) is headquartered in Dongguan, the world manufacturing center. Shan Zhi has set up several research institutes in its headquarters. With its unique technical advantages and dozens of professional benefits, Shan Zhi enterprises have become high-tech enterprises in the field of professional audio in China. Shanghai World Expo also uses this brand of speakers. The top ten domestic brands of audio are not more comprehensive in use than Betasray.