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Changzhou Chaoyin Electronics Co., Ltd. was founded in 1998. It is a technology-based private enterprise specializing in the development and production of electromagnetic buzzers, piezoelectric buzzers, alarms and other electroacoustic products. The company is located in Changzhou, Jiangsu, the birthplace of buzzers. The company covers an area of 8,000 square meters, with a clean plant of 5,000 square meters. Among the 200 employees, there are 5% middle and senior technical personnel. The company has passed the ISO9001:2000 international quality system certification in 2000. All series of products produced comply with the EU ROHS directive and have passed a number of EU deduction inspections. Since its establishment, the company has been adhering to the principle of customer first and honesty first, and has been making unremitting efforts to develop and produce high-quality buzzer products that are widely used in: various instruments and meters, equipment alarm systems, measuring equipment, wireless transmission equipment, automotive instruments, medical equipment, communication equipment, quartz clock movements, computer terminals, etc. The companys main supply channels include Joyoung, Lenovo, Siemens, large well-known manufacturers, etc.