Changzhou Duobo Ying Machinery Co., Ltd.

Changzhou Double Spring Machinery Co,. LTD is located at Changzhou, Jiangsu a land of fish and rice. Here the scenery is beautiful, the economy is developed, so the communication is very convenient.Our company have 10 years professional experience in doing mechanical buzzer, piezoelectric active buzzer, electromagnetic buzzer, super thin speaker magnetic speaker in plastic or iron shell. We have 500 skilled workers, and an advanced RD Department. Our factory has the area over 5000 square meters. We have implemented total quality control, and also have got the ISO9002 Certificate. Our annual output is up to 60 million pieces. Our companys products can be widely used, and have got good reputation both at home and abroad for its quality.