Changzhou Wujin Yueda Electroacoustic Equipment Co., Ltd., established in 1994, is an ISO 9001 certified professional manufacturer of electro-acoustic products. Our product portfolio includes YUESEN brand speakers, and YUEDAXI brand back-up alarms. Our years of specialist expertise in the industry, together with complete production and testing equipments, enable us to deliver extremely reliable products. Our speakers are mainly used for TV, speaker systems and other multimedia electronics. We now have business with worldwide customers, including some world class companies. Our back-up alarms are mainly used for commercial vehicles, construction machinery and agricultural machinery. All products are CE certified. Testing reports by third-party lab and service feedbacks from our customers, including some leading in the industry, show that our products are superior reliable to most competing ones. Please feel free to contact us if we can help.