St. Kay'an science and technology ltd., shenzhen city, has a registered address at 1511. It is located in shenzhen city, in the grand luxen river age building of the long wave street street community, and is registered with the shenzhen city market supervision authority, with legal representation from li. It operates on general operating projects: instrumentation forms, electronics, industrial controlled products, environmental monitoring products, security products, sensors, electronic modules, detectors, analysers, alarms, hosts, monitoring systems, electronic surveillance alarm equipment, gas detection devices, fire earthquake alarm equipment, development of electronic sensors, marketing and technical advice; sale of blast and protective equipment; development, design and installation of smart transport and security control systems; computer software development and marketing; construction of computer networks; internal trade, import and export of goods and technology (projects involving authorized operations, approved by the competent authorities and registered by the business administration) and is permitted to operate on fire detection equipment, electrical communication and monitoring systems; and production of production instruments, engineering control products, environmental monitoring products, security protection products, sensors, electronic monitoring devices, surveillance devices, surveillance devices, surveillance systems, surveillance systems, and surveillance of explosives。