Shenzhen Professional Security Technology Company located in Shenzhen China. It is a large-scale professional manufacturer integrated with R and 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 etc. All the products manufactured and sold by PST are approved and certificated by FCC, CCC, CE, UL and RoHS compliance etc.