C309, Bldg. C, Changjiang Software Park, 180 Changjiang South Rd., Baoshan Area, Shanghai, China (Mainland)

Shanghai Biancheng Electronic Technology Co., Ltd.is a wireless calling system , coaster pager, service bell, call the business, get food, emergency alarms and other professional production and proce...

Shenzhen JDYGSM Technology co.,Ltd has gathered a professional elite team in security alarm field. Our company has become a high tech enterprise by uniting the technological innovation, research and d...