Shenzhen sinda technology Co., Ltd. was established in 2003, is china gsm security system of the earliest and most professional equipment suppliers, over the years gsm security products dedicated to the development, production and marketing, with their own knowledge intellectual property core technology. The company has a number of years of experience in the industry, technology strong, good quality, enterprising professional development, production and sales team the company covers the technical design of electronic technology, automatic control, computing machine applications and communications professional, from development and design of hardware and software are equipped with regulation van management. Its products are widely used in homes, community property, power, department of transportation industry, petroleum, chemical, coal, railway, municipal, public security door safety devices, data monitoring and remote monitoring.