Qingdao Spree Mechanical and Electrical Technology Co., Ltd., their products are very good, they make permanent magnet couplers and permanent magnet speed regulators. Qingdao Spree Mechanical and Electrical Technology Co., Ltd. was established in 2008. It is a high-tech enterprise focusing on the research and development, production, sales and service of permanent magnet drive technology. The technical level of many of the company's products is internationally leading. It has completely independent intellectual property rights. By the end of 2010, the company had applied for 16 patents and obtained 7 national patent certificates. The company has received strong support from provincial and municipal science and technology departments and is currently undergoing high-tech product identification.