... / DCS1800MHz >315 MHz or 433MHz Frequenc gsm module home alarm system with Auto PIR Sensor 315/433Mhz Frquency 10 Wireless ... for villages, houses, shops, smal and medium stores, cars, hospitals , schools, libraries, banks, offices, factory, company, etc. Features: >Could use with ... groups (no more than 20 digits)Sirenmore than 110 dBWorking Temperature-15°c to +55°cRHless than 90% Standard package: ...