... arm, disarm, GSM signal, power, alarm, etc. The specific functions are as follows1. Auto detects doors or windows are closed or ... numbers & call 3 preset telephone numbers by turns while alarm triggered.6. 10 seconds recording function when alarming, and ... Specificationsa) GSM frequency:900/1800/850/1900MHz (Optional) b) Alarm mode:SMS data transmission & voice platformc) Stand-by power consumption ...