Shenzhen Professional Security Technology Company located in Shenzhen China. It is a large-scale professional manufacturer integrated with R&D, manufacturing, developing, marketing and after-sales service for over 1000 kinds of security products such as home alarm system, car alarm system, GPS trackers, CCTV surveillance system and video door phone system etc. And all the products produced and sold by PST are approved and certificated by FCC, CCC, CE, UL and RoHS compliance etc international certificates. By right of advanced development equipments and inspection equipments as well as fruitful technical support, effective production line, good workmanship and quality control system and the Joint effort from all the staffs and workers, Shenzhen Professional Security Technology Company has being one of the most professional and Influential security products,leading manufacturers in domestic and abroad.