Shenzhen Sinda Technology Co., Ltd is one of the mid-scale enterprise and specializes in designing, manufacturing and sale of Patrol Hawk series of alarm system. With around 20 highly experienced engineers, Patrol Hawk has developed 7 main series and more than 25 types of alarm system, which are being used in home, commercial, car, industrial fields. Certain systems are deployed at electric power plants, street light, transformer and oil fields. Today our main products include: GSM Home Alarm System GSM MMS alarm system GSM Industrial Alarm System GSM Car Alarm System Telephone Line Alarm System GSM Monitoring Center Most of our products have approved by FCC & CE. Until now, we have owned 1400 distributors in 20 provinces across China. Also, the oversea market is also developing in a rapid way.