No need of telephone line in order to have your location fully protected Circuit controlling for appliances Password protected Can use mobile phone to activate or deactivate the system by sending short message Up to 6 telephone numbers can be pre-stored in the unit and dialed to summon help in priority order Emergency/panic button is available for 24 hours whenever arm/disarm Separately arm/disarm for certain detected areas Program the duration length of the siren Able to link up to the networks of alarm center through an ID code Power supply: Input: AC 110V; 220V; 230 - 240V Output: DC 9V, 300mA Built-in transmitter: 315MHz/433MHz Frequency: 900/1,800/1,900MHz Temperature range: -10 to 50 degrees Celsius Operating range: up to 150 meters in open place Widely used in the home, shop, school, hospital, factory, warehouse, villa,bank, government, jail and outdoors