Ningbo Joiwo Explosion-proof Science and Technology Co., Ltd. ,established in 2011 is a high-tech company with the management system of research and development, production and sales. The product line was expanded to industrial telephone and monitoring system. The company has created the brand of JOIWO since the starting period and it has become the network provider of many famous domestic and international enterprise with its high quality products and service. The industrial telephones and cameras have been widely used in petroleum, chemical, coal, electric power, prisons, Railways, metallurgy, ships, fire and other industries.