... zone >GSM900/ DCS1800MHz >315 MHz or 433MHz Frequenc gsm module home alarm system with Auto PIR Sensor 315/433Mhz Frquency ... Description: The product is integrated PIR sensor, magnetic sensor and other top technology. When the system detects someone intrusion, ... gas. The system can used for villages, houses, shops, smal and medium stores, cars, hospitals , schools, libraries, banks, offices, factory ...