Shenzhen TY Technology Co., Ltd.Formerly known as Hong Kong Charteze Alarm System Manufactory, our company was founded in 1997. We are a Hi-tech security enterprise engaged in the research, development, manufacture and sale of security products. As a pioneering security solution supplier in China, our company boasts a group of well-trained technical and management personnel who have rich experience in working in world's well-known security enterprises. After over 15 years of development, our company has popularized two brands of our own - TY and PGST.