Ningbo Joiwo Explosion-proof Science and Technology Co., Ltd. is located in Zhejiang Province. Our product line includes explosion proof telephone, weatherproof telephone, jail phone and other vandal resistant public phone. We manufacture most of the parts of the phones by ourselves and it gives us much advantage over the cost and quality control. Our telephones are widely used in jails, schools, vessel, petroleum and oil drilling platform etc. our jail phones have also gained good reputation from our customers in USA, Europe and Middle East. Our company has the capabilities of R&D, manufacturing, assembly, testing, installation and technical services.