CY (Changzhou Chaoyin Elec) was established in 1998 and is located in Changzhou, Jiangsu Province. It is a technology-oriented private enterprise specializing in the development and production of electroacoustic products, including electromagnetic buzzers, piezoelectric buzzers, and alarms. The company covers an area of 8,000 square meters, with 5,000 square meters of cleanroom space, and has obtained ISO9001:2000 international quality system certification. The main products include electromagnetic buzzers, piezoelectric buzzers, and alarm devices.