SONO (HK) International Electronics Co., Limited is headquartered in Hong Kong of China, gathering the densest hi-tech companies of China. Its branches have Shenzhen OKD Electronics Co., Ltd. and Shenzhen SONO Electronic Co., Ltd. Founded in 2001, SONO is a hi-tech company specialized in the R&D, production, sale and engineering services. Our company has set up offices and branches in large and medium cities of China. Our company is professionally producing various high quality metal detectors, ...