Hang Hongda Science and Technology was established in 2009, focus on intelligent electronic lock technology research and development and application. Now has the core technologies of the Internet of Things such as GPS, GPRS, 3G, WIFi, UHF, NFC, satellite communications, video, etc., has completed GPS electronic locks, RF electronic locks, NFC electronic locks, satellite communications locks, smart security boxes, Zhitong controller Series of products.