introduction: 1.No need of telephone line in order to have your location fully protected 2.Program the duration length of the siren. 3.Password protected. 4.Record your own personal message for ten seconds 5.Up to 6 telephone numbers can be pre-stored in the unit and dialed to for help in priority order. 6.Remote command and access to the system from anywhere via any telephone/mobile 7.Emergency/panic button is available for 24 hours whenever arm/disarm 8.Separately arm/disarm for certain detected areas 9. Able to link up to the networks of alarm center through an ID code 10. keypad operation and setting 11. SMS short message setting function