Shidean Technology Industries Co., a manufacturer of high-quality audio/video door phones and surveillance equipment based in Shenzhen, China.We are looking for new business partners in North and South America, where we are expanding our business. We can offer you a wide variety of models and competitive pricing backed by committed, comprehensive service.Our products have CE certification, and are currently undergoing approval for sale in the United States.We have more then 40 models of door phone available and including different types of cameras, and our R&D