Guangzhou Yulong Tenggao Electronic Technology Co., Ltd. is a leading manufacturer of audio-visual systems in China. There are more than 100 engineers in the R&D center. The factory covers an area of more than 11,000 square meters, providing customers with one-stop services for various audio-visual equipment. Our product line includes public address system, conference system, video conference system, central control matrix system and so on.Each system meets the highest quality standards in the industry. For more than ten years, we have never given up the pursuit of high quality. All products have passed 3C certification. Export products have passed CE, RoHSCB, UL and EN certifications.