Shenzhen Patrol Hawk Technology Co., Ltd is a professional manufacturer of GSM security alarm systems, established in July of 2003. We specialized in designing,manufacturing and selling of GSM security Home alarm system, GSM industry alarm system, MMS alarm system, GSM power transformer alarm system, GSM data acquisition alarm system, GSM Monitoring Center software, burglar alarm system, House intruder alarm system, Telephone Line Alarm System, and so on